HP Paper Q6595A is compatible in the following HP Models:

HP Officejet Pro K550 Color Printer series

HP OFFICEJET PRO K550 COLOR PRINTER - C8157A
HP OFFICEJET PRO K550DTN COLOR PRINTER - C8158A
HP OFFICEJET PRO K550DTWN COLOR PRINTER - C8159A
HP OFFICEJET PRO K550DTWN COLOR PRINTER - C8159B
HP OFFICEJET PRO K550XI DTN COLOR PRINTER - C8190A

HP Deskjet D4200 Printer series

HP DESKJET D4245 PRINTER - CB643A
HP DESKJET D4260 PRINTER - CB641A
HP DESKJET D4260 PRINTER - CB641B
HP DESKJET D4260 PRINTER - CB644C
HP DESKJET D4263 PRINTER - CB641C
HP DESKJET D4268 PRINTER - CB641D

HP Deskjet D2400 Printer series

HP DESKJET D2430 PRINTER - CB614A
HP DESKJET D2445 PRINTER - CB613A
HP DESKJET D2460 PRINTER - CB611A
HP DESKJET D2468 PRINTER - CB612D

HP Deskjet 9800 Printer series

HP DESKJET 9800 PRINTER - C8165A
HP DESKJET 9800D PRINTER - C8166A

HP Deskjet 9600 Printer series

HP DESKJET 9650 PRINTER - C8148A
HP DESKJET 9670 PRINTER - C8149A

HP Deskjet 9300 Printer series

HP DESKJET 9300 PRINTER - C8142A

HP Deskjet 6600 Printer series

HP DESKJET 6620 COLOR INKJET PRINTER - C9034A
HP DESKJET 6620 COLOR INKJET PRINTER - C9034B
HP DESKJET 6620XI COLOR INKJET PRINTER - C9056A
HP DESKJET 6623 COLOR INKJET PRINTER - C9034C
HP DESKJET 6628 COLOR INKJET PRINTER - C9034D

HP DesignJet 130 Printer series

HP DESIGNJET 130 PRINTER - C7791C
HP DESIGNJET 130NR PRINTER - C7791D

HP Business Inkjet 2800 Printer

HP BUSINESS INKJET 2800 PRINTER - C8174A
HP BUSINESS INKJET 2800DT PRINTER - C8163A
HP BUSINESS INKJET 2800DTN PRINTER - C8164A