The HP CB435A is a Color LaserJet Black Print Cartridge. When time is money, the latest in Original HP print cartridge and toner technology keep your printer and your business running at its best. You get bold, crisp text and sharper images with spherically-shaped HP monochrome toner. And to keep you working without interruption. HP has added intelligence to the cartridge that enables alerts when supplies are low and facilitates convenient supplies reordering through HP SureSupply.