HP Memory (Product) C2065A is compatible in the following HP Models:

HP Paintjet XL Printer series

HP PAINTJET XL300 PRINTER - C1645A
HP PAINTJET XL300/PS PRINTER - C1656A

HP Original DesignJet Printer series

HP DESIGNJET PRINTER (C1633A) - C1633A
HP DESIGNJET PRINTER (C1633B) - C1633B

HP LaserJet SIMMs

HP LASERJET SIMM 4 MB - C2065A

HP LaserJet III Printer series

HP LASERJET IIISI PRINTER - 33491A

HP LaserJet 4 Printer series

HP LASERJET 4 PRINTER - C2001A
HP LASERJET 4M PRINTER - C2021A
HP LASERJET 4SI MX PRINTER - C2011A
HP LASERJET 4SI PRINTER - C2010A

HP Deskjet 1200 Printer series

HP DESKJET 1200C/PS PRINTER - C1686A

HP DesignJet 600 Printer series

HP DESIGNJET 600 PRINTER - C2847A
HP DESIGNJET 600 PRINTER (E/A0-SIZE) - C2848A
HP DESIGNJET 650C PRINTER - C2858A
HP DESIGNJET 650C PRINTER (E/A0-SIZE) - C2859A
HP DESIGNJET 650C PRINTER MODEL B - C2858B
HP DESIGNJET 650C PRINTER MODEL B (E/A0-SIZE) - C2859B
HP DESIGNJET 650C/PS PRINTER - C3791A
HP DESIGNJET 650C/PS PRINTER - C3792A

HP DesignJet 200 Printer series

HP C3180A DESIGNJET 200 PRINTER - C3180A
HP C3181A DESIGNJET 200 PRINTER - C3181A
HP DESIGNJET 220 PRINTER - C3187A
HP DESIGNJET 220 PRINTER (E/A0-SIZE) - C3188A
HP DESIGNJET 230 PRINTER - C4694A
HP DESIGNJET 230 PRINTER (E/A0-SIZE) - C4695A
HP DESIGNJET 250C PRINTER - C3191A
HP DESIGNJET 250C PRINTER (D/A1-SIZE) - C3190A

HP Color LaserJet Original Printer series

HP COLOR LASERJET PRINTER - C3100A