These printers use the GPR40H cartridge:

Canon i SENSYS LBP 6750 DN 4

Canon i SENSYS LBP 6750 X

Canon i SENSYS LBP 6780 X

Canon i-SENSYS LBP-6750DN

Canon ImageClass LBP 6780 DN

Canon LaserShot LBP 6750

Canon Satera LBP 6700