200096 usato Generatore/alternatore, online, prezzo basso, 213 pagina

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2993cm3 235kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2993cm3 235kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2993cm3 231kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2497cm3 177kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2993cm3 218kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 2993cm3 218kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 1995cm3 163kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:BMW 5 E60 E61 2001 1995cm3 163kW ManualeCodice articolo simile

CA1905

063731905010

112529

12090087

12317789981

12317789984

12317792072

12317797521

12317797522

12317799204

12317802929

12317834160

1490101800

188321

1986A01770

200029

200036

200213

210495

210495A

2132622

2137124

2151471702

215536170000

215536170004

215536170280

215536170346

215536170500

23319N

254845

254845V

284812

301905RI

301905RIV

3115420

3115421

3115422

32080350

3EFFE

437450

437556

439485

439559

4782

4880350

4G0087

4G0087R

550568

5515184

57076

7792072

7834160

8035

831011005

8EL011710891

9090363

A01224SEG

A12VA0033

A12VA0033AS

A131966

A3098

A3098PR

A3098SR

A3098VALEO

ACCBA1905

AINDE

AL02412

AL214JM

ANDEL

ASPL

AUTOELECTRO

BOSCH

CA1905VALEOOEM

CAL15269AS

CAL15269GS

CAL15269RS

CASCO

CEVAM

DIXIE

EAA

EAI

ELECTROLOG

ELSTOCK

ERA

F032113896

F032116158

G107891

G107892

G107922

GHIBAUDI

GPARTS

H5515184

HCPARTS

HELLA

KRAUF

KUHNER

L82080

LOGISTIK

LRA02319

LUCAS

MAGNETIMARELLI

NRG5903

NRGV2

POWERMAX

PSH

QRA2438

RHIAG

SIDAT

SKGN0320086

TTAL001090

V201350007

V201350040

V201380350

VALEO

WAL00047

WG2280994

WG2471396

WG2471439

WILSON

WOODAUTO

Nerings, SIA

271,04 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:Hyundai i30 2004 1582cm3 128kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:KIA Pro Cee'd I 2005 1582cm3 90kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:KIA Pro Cee'd I 2005 1582cm3 115kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:KIA Ceed 2003 1582cm3 90kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:KIA Ceed 2003 1582cm3 90kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:Hyundai i30 2004 1582cm3 90kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa

7

Generatore/alternatore

Tratto da:Hyundai i30 2004 1582cm3 116kW ManualeCodice articolo simile

CA1906

10443483

112495

12060892

13596

155532120120

155532120340

155532120346

155532120361

155532120395

200196

20796N

210650

210650A

210650R

210814

2241941202

285637

301906RI

301906RIV

3112305

3112307

3112308

373002A100

373002A110

373002A150

373002A160

373002A200

373002A500

439607

440123

4834003

4G0519

4G0519R

550549

5515237

57330

616132

616153

8106

831043012

8EL012429841

9090511

9409

A12HY0112

A12HY0112A2

A130362

A3235PR

A3235S

A3235VALEO

A521351054

A9295S

ACCBA1906

AINDE

AL02677

AL221JM

ASPL

AUTOELECTRO

BOSCH

CA1906VALEOOEM

CAL32130AS

CAL32130GS

CASCO

CEVAM

DAN1517

EAI

ELSTOCK

ERA

F032114495

G102238

G102239

G105829

GHIBAUDI

H511I19

H5515237

HCPARTS

HELLA

IR6010

J5110531

KRAUF

KUHNER

L83880

LRA03025

LUCAS

N5110323

NRG5898

NRGV2

POWERMAX

PRESTOLITE

PSH

QRA3158

RNL

ROLLCO

SKGN0320741

TTAL001077

VALEO

WAL00176

WG2196906

WG2281022

WG2471472

WG2472081

WG2632562

WG2632582

WOODAUTO

Nerings, SIA

272,52 €

+Consegna: --

IVA inclusa