These printers use the C6657 cartridge:

HP DesignJet 9600
HP DeskJet 450
HP DeskJet 450 CBI
HP DeskJet 450 CI
HP DeskJet 450 CI Mobile
HP DeskJet 450 WBT
HP DeskJet 5145
HP DeskJet 5150
HP DeskJet 5150 C
HP DeskJet 5150 W
HP DeskJet 5151
HP DeskJet 5160
HP DeskJet 5168
HP DeskJet 5500
HP DeskJet 5550
HP DeskJet 5550 V
HP DeskJet 5550 W
HP DeskJet 5551
HP DeskJet 5552
HP DeskJet 5650
HP DeskJet 5650 C
HP DeskJet 5650 W
HP DeskJet 5655
HP DeskJet 5850
HP DeskJet 5850 W
HP DeskJet 9650
HP DeskJet 9670
HP DeskJet 9680
HP Digital Copier 410
HP Digital Copier Printer 410
HP OfficeJet 2110 All In One
HP OfficeJet 2110 V All In One
HP OfficeJet 2110 XI All In One
HP OfficeJet 4105
HP OfficeJet 4105 Z
HP OfficeJet 4110
HP OfficeJet 4110 All In One
HP OfficeJet 4110 V
HP OfficeJet 4110 V MFP
HP OfficeJet 4110 XI
HP OfficeJet 4110 XI MFP
HP OfficeJet 4115
HP OfficeJet 4211
HP OfficeJet 4212
HP OfficeJet 4215
HP OfficeJet 4215 All In One
HP OfficeJet 4215 V
HP OfficeJet 4215 XI
HP OfficeJet 4219
HP OfficeJet 4251
HP OfficeJet 4252
HP OfficeJet 4255
HP OfficeJet 4259
HP OfficeJet 5500
HP OfficeJet 5505
HP OfficeJet 5505 All In One
HP OfficeJet 5508
HP OfficeJet 5508 All In One
HP OfficeJet 5510
HP OfficeJet 5510 All In One
HP OfficeJet 5510 V
HP OfficeJet 5510 XI
HP OfficeJet 5515
HP OfficeJet 5515 All In One
HP OfficeJet 6105
HP OfficeJet 6110
HP OfficeJet 6110 All In One
HP OfficeJet 6110 V
HP OfficeJet 6110 XI
HP OfficeJet 6127 All In One
HP OfficeJet 6150
HP OfficeJet 6612 All In One
HP PhotoSmart 100
HP PhotoSmart 130
HP PhotoSmart 130 V
HP PhotoSmart 130 XI
HP PhotoSmart 145
HP PhotoSmart 145 V
HP PhotoSmart 145 XI
HP PhotoSmart 230
HP PhotoSmart 230 V
HP PhotoSmart 230 XI
HP PhotoSmart 245
HP PhotoSmart 245 V
HP PhotoSmart 245 XI
HP PhotoSmart 7000 Series
HP PhotoSmart 7150
HP PhotoSmart 7150 V
HP PhotoSmart 7260
HP PhotoSmart 7260 V
HP PhotoSmart 7260 W
HP PhotoSmart 7268
HP PhotoSmart 7345
HP PhotoSmart 7350
HP PhotoSmart 7350 V
HP PhotoSmart 7350 W
HP PhotoSmart 7450
HP PhotoSmart 7450 V
HP PhotoSmart 7450 XI
HP PhotoSmart 7550
HP PhotoSmart 7550 V
HP PhotoSmart 7550 W
HP PhotoSmart 7655
HP PhotoSmart 7660
HP PhotoSmart 7660 V
HP PhotoSmart 7660 W
HP PhotoSmart 7660 XI
HP PhotoSmart 7665
HP PhotoSmart 7755
HP PhotoSmart 7760
HP PhotoSmart 7760 V
HP PhotoSmart 7760 W
HP PhotoSmart 7762
HP PhotoSmart 7960
HP PhotoSmart 7960 V
HP PhotoSmart 7960 W
HP Printer Scanner Copier 130 XI
HP Printer Scanner Copier 1100
HP Printer Scanner Copier 1110
HP Printer Scanner Copier 1110 V
HP Printer Scanner Copier 1110 XI
HP Printer Scanner Copier 1118
HP Printer Scanner Copier 1200
HP Printer Scanner Copier 1205
HP Printer Scanner Copier 1209
HP Printer Scanner Copier 1210
HP Printer Scanner Copier 1210 All In One
HP Printer Scanner Copier 1210 V
HP Printer Scanner Copier 1210 V All In One
HP Printer Scanner Copier 1210 XI
HP Printer Scanner Copier 1210 XI All In One
HP Printer Scanner Copier 1213
HP Printer Scanner Copier 1215
HP Printer Scanner Copier 1217
HP Printer Scanner Copier 1219
HP Printer Scanner Copier 1310
HP Printer Scanner Copier 1310 All In One
HP Printer Scanner Copier 1311
HP Printer Scanner Copier 1311 All In One
HP Printer Scanner Copier 1312
HP Printer Scanner Copier 1315
HP Printer Scanner Copier 1315 All In One
HP Printer Scanner Copier 1315 V
HP Printer Scanner Copier 1315 XI
HP Printer Scanner Copier 1315 XIF
HP Printer Scanner Copier 1317
HP Printer Scanner Copier 1318
HP Printer Scanner Copier 1340
HP Printer Scanner Copier 1340 All In One
HP Printer Scanner Copier 1345
HP Printer Scanner Copier 1350
HP Printer Scanner Copier 1350 All In One
HP Printer Scanner Copier 1350 V
HP Printer Scanner Copier 1350 XI
HP Printer Scanner Copier 1355
HP Printer Scanner Copier 1358
HP Printer Scanner Copier 2100
HP Printer Scanner Copier 2105
HP Printer Scanner Copier 2108
HP Printer Scanner Copier 2110
HP Printer Scanner Copier 2110 All In One
HP Printer Scanner Copier 2110 V
HP Printer Scanner Copier 2110 V All In One
HP Printer Scanner Copier 2110 XI
HP Printer Scanner Copier 2110 XI All In One
HP Printer Scanner Copier 2115
HP Printer Scanner Copier 2150
HP Printer Scanner Copier 2170
HP Printer Scanner Copier 2171
HP Printer Scanner Copier 2175
HP Printer Scanner Copier 2175 All In One
HP Printer Scanner Copier 2175 V
HP Printer Scanner Copier 2175 XI
HP Printer Scanner Copier 2179
HP Printer Scanner Copier 2200
HP Printer Scanner Copier 2210
HP Printer Scanner Copier 2210 All In One
HP Printer Scanner Copier 2210 V
HP Printer Scanner Copier 2210 X
HP Printer Scanner Copier 2210 XI
HP Printer Scanner Copier 2310
HP Printer Scanner Copier 2405
HP Printer Scanner Copier 2410
HP Printer Scanner Copier 2410 PhotoSMART All In
HP Printer Scanner Copier 2410 V
HP Printer Scanner Copier 2410 XI
HP Printer Scanner Copier 2420
HP Printer Scanner Copier 2510
HP Printer Scanner Copier 2510 PhotoSMART All In
HP Printer Scanner Copier 2510 XI
HP Printer Scanner Copier 2550
Olivetti Jobjet M-300
Olivetti Jobjet M-400
Olivetti Jobjet P-210