HP Upgrade Kit C3390A is compatible in the following HP Models:

HP PCL5/PostScript Upgrade Kits

HP 2500C PCL5 SIMM UPGRADE KIT - C3390A

HP 2500c Printer series

HP 2500C PLUS PRINTER - C2692A

HP 2500C PRINTER - C2684A

HP 2500CM PRINTER - C2685A

HP 2500CM PRINTER - C2685B

HP 2500CSE PRINTER - C2686A

HP 2500CXI PRINTER - C2687A