3 in total, numbers 56 x 1 and 28 x 2.
BNIB, unopened and genuine HP.
£25 plus £5 P&P, if interested drop me a PM before I E Bay them Friday.

The 56 fits the following;
Officejet: 4110, 4215, 4255, 5610, 6110. PSC: 1100, 1350, 1215, 1315, 2410, 2510.
Deskjet 5150.
Photosmart: 7150, 7260, 7345, 7350, 7550, 7660, 7760, 7960, 7450.

The 28's fit the following;

HP Deskjet 3320 HP Deskjet 3325 HP Deskjet 3420 HP Deskjet 3425
HP Deskjet 3520 HP Deskjet 3550 HP Deskjet 3600 HP Deskjet 3650
HP Deskjet 3745 HP Deskjet 3845 HP Officejet 4110V HP Officejet 4110XI
HP Officejet 4215 HP Officejet 4255 HP PSC 1100 HP PSC 1110
HP PSC 1110V HP PSC 1110XI HP PSC 1200 HP PSC 1210
HP PSC 1210V HP PSC 1210XI HP PSC 1219 HP PSC 1310
HP PSC 1311 HP PSC 1312 HP PSC 1315 HP PSC 1315V
HP PSC 1315XI HP PSC 1317 HP PSC 1318 HP PSC 1340
HP PSC 1345 HP PSC 1350 HP PSC 1350V HP PSC 1350XI
HP PSC 1355 HP PSC 2105 HP PSC 2110 HP PSC 2110V
HP PSC 2110XI HP PSC 2115 HP PSC 2170 HP PSC 2171
HP PSC 2175 HP PSC 2175V HP PSC 2175XI HP PSC 2210
HP PSC 2210V HP PSC 2210XI