These printers are compatible with the C3906A toner cartridge

CANON LBP 440
CANON LBP 460
CANON LBP 465
CANON LBP 660
CANON LBP AX
CANON P 445
HP 3994 A
HP 3996 A
HP LaserJet 5L
HP LaserJet 5L FS
HP LaserJet 5L X
HP LaserJet 6L
HP LaserJet 6L se
HP LaserJet 6L xi
HP LaserJet 3100
HP LaserJet 3150