XEROX BLACK TONER CARTRIDGE EQUIVALENT TO HP 78A FOR USE IN LASERJET PRO P1566, P1606, M1536 MFP, CANON IMAGECLASS LBP6200, D530 MFP, D550 MFP, MF4412, MF4420, MF4450, MF4550, MF4570, MF4580, MF4770, MF4880, MF4890, FAXPHONE L190