HP Paper (Glossy) C6821A is compatible in the following HP Models:

HP Deskjet 9600 Printer series

HP DESKJET 9650 PRINTER - C8137A
HP DESKJET 9650 PRINTER - C8148A
HP DESKJET 9670 PRINTER - C8138A
HP DESKJET 9670 PRINTER - C8149A
HP DESKJET 9680 PRINTER - C8139A

HP Deskjet 9300 Printer series

HP DESKJET 9300 PRINTER - C8136A
HP DESKJET 9300 PRINTER - C8142A

HP Deskjet 1200 Printer series

HP DESKJET 1220C PRINTER - C2693A
HP DESKJET 1220C/PS PRINTER - C8100A
HP DESKJET 1220CSE PRINTER - C2695A
HP DESKJET 1220CXI PRINTER - C2694A

HP Deskjet 1100 Printer series

HP DESKJET 1180C PRINTER - C8128A

HP DesignJet A3+/B+ Graphic Printer series

HP DESIGNJET 10PS PRINTER - C7790A
HP DESIGNJET 10PS REMARKETED PRINTER - C7790AR
HP DESIGNJET 20PS PRINTER - C7790B
HP DESIGNJET 20PS REMARKETED PRINTER - C7790BR
HP DESIGNJET 50PS PRINTER - C7790C

HP DesignJet 90 Printer series

HP DESIGNJET 90 PRINTER - Q6656A
HP DESIGNJET 90R PRINTER - Q6656B

HP DesignJet 30 Printer series

HP DESIGNJET 30 PRINTER - C7790D
HP DESIGNJET 30N PRINTER - C7790E

HP DesignJet 130 Printer series

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

HP DesignJet 120 Printer series

HP DESIGNJET 120 PRINTER - C7791A
HP DESIGNJET 120 REMARKETED PRINTER - C7791AR
HP DESIGNJET 120NR PRINTER - C7791B
HP DESIGNJET 120NR REMARKETED PRINTER - C7791BR

HP DesignJet 110plus Printer series

HP DESIGNJET 110PLUS NR PRINTER - C7796E
HP DESIGNJET 110PLUS PRINTER - C7796D

HP DesignJet 110 Color Printer

HP DESIGNJET 110 COLOR PRINTER - C7796B

HP DesignJet 100plus Printer series

HP DESIGNJET 100PLUS PRINTER - C7796C
HP DESIGNJET 100PLUS REMARKETED PRINTER - C7796CR

HP DesignJet 100 Printer series

HP DESIGNJET 100 PRINTER - C7796A
HP DESIGNJET 100 REMARKETED PRINTER - C7796AR

HP Color Inkjet cp1700 Printer series

HP COLOR INKJET CP1700 PRINTER - C8108A
HP COLOR INKJET CP1700 REFURBISHED PRINTER - C8108AR
HP COLOR INKJET CP1700D PRINTER - C8106A
HP COLOR INKJET CP1700PS PRINTER - C8105A

HP Business Inkjet 2600 Printer series

HP BUSINESS INKJET 2600 PRINTER - C8109A
HP BUSINESS INKJET 2600DN PRINTER - C8110A