The hp laserjet c3903a print cartridge is designed to work together with the hp laserjet 5p 5mp 6p and 6mp printers for professional quality output features microfine black toner for clear sharp results high detail graphics print with clean more precise edges 600 x 600 dpi printing for rich impressive blacks designed to work flawlessly with hp laserjet specialty and everyday papers backed by hps limited lifetime warranty free and easy recycling of all hp laserjet cartridges through hp pl