This is a remanufactured replacement for the Hewlett Packard C9704A (HP 121A) laser drum unit. It is designed to perform reliably with your HP printer, providing an economical alternative to the original HP C9704A drum cartridge. The remanufactured C9704A drum cartridges are produced using both OEM and non-OEM parts, ensuring quality and reliability. The use of these remanufactured cartridges does not void your printer's warranty. Backed by our 100% Satisfaction Guarantee.