The HP CB400A remanufactured black toner cartridge from Castle Ink is a direct replacement for the OEM HP CB400A, built for HP LaserJet, OfficeJet, DeskJet or DesignJet office printers. It’s an economical way to keep your printer in service without paying full OEM prices, while still meeting the print-quality standards your team expects.The CB400A delivers dense, dark black for sharp text, line work and reliable bar-code scanning. Castle Ink uses finely ground monochrome toner with consistent particle size so output looks crisp at first print and stays consistent through the life of the cartridge. Every CB400A is assembled with a fresh imaging chip (where applicable), color-balanced toner powder, then individually tested before shipping. Castle Ink backs every CB400A with a 100% satisfaction guarantee: if you aren’t happy with quality or yield, we replace or refund it.Compatible HP Printers HP Color LaserJet CP4005 HP Color LaserJet CP4005dn HP Color LaserJet CP4005n Product Specifications SKU: CB400A OEM Reference: HP CB400A Color: Black Cartridge Type: Remanufactured (non-OEM) Format: Laser Toner Brand Compatibility: HP Warranty: Castle Ink 100% satisfaction guarantee Shipping: Free U.S. shipping; same-day dispatch on orders before 2pm ET Frequently Asked QuestionsWill the CB400A void my HP printer warranty? No. Under the U.S. Magnuson-Moss Warranty Act, your printer manufacturer cannot void your warranty solely because you installed a compatible (non-OEM) cartridge.How does print quality compare to the genuine HP CB400A? The CB400A is engineered to match the OEM cartridge’s particle size, charge profile and toner densities so day-to-day output should look essentially identical. If you ever see a difference, our satisfaction guarantee covers a free replacement or refund.How fast will my order ship? Orders placed before 2pm ET ship the same business day from our U.S. warehouse with free standard shipping. Expedited options are available at checkout.