MF621 MF623 MF624 CN C CX CW related industry for printer/copier/MFP MF621 MF623 MF624 CN C CX CW color/Colour Black/Cyan/Magenta/Yellow chips for compatible new toner cartridge page yield/page Capacity/printing life BK-1400/2400 CMY-1500 PAGES at 5% coverage rate by A4 paper printer...