HP Color LaserJet CB400A Black Print Cartridge with HP Colorsphere Toner - Ready for fast, outstanding, and cost-effective printing? Optimize your print quality and reliability with HP's new Color LaserJet CB400A Black Print Cartridge with HP ColorSphere Toner. Get consistently sharp black with the reliable ColorSphere toner. Increase your productivity with the efficient operation. Minimize interruptions with the low-maintenance cartridge; receive automatic alerts when it's low or out.