HP Manual
C3990-90903
is compatible in the following HP Models:
HP LaserJet 6 Printer series
HP LASERJET 6L GOLD PRINTER - C4245A
HP LASERJET 6L PRINTER - C3990A
HP LASERJET 6L PRO PRINTER - C8060A
HP LASERJET 6L REMARKETED PRINTER - C3990AR
HP LASERJET 6LSE PRINTER - C3994A
HP LASERJET 6LXI PRINTER - C3996A