The CF400A 201A Black Toner Cartridge is a compatible unit for HP printers, specifically designed for LaserJet models M252 and M277 series. This black toner cartridge is manufactured in China and comes in a pack of 1 unit. It is suitable for use in printers such as the M252dn, M252dw, M277dw, and M277n, providing high-quality black printing for various professional or personal printing needs.