Compatible HP Q3964A / C9704A Drum. For the following machines: Color LaserJet 2550L, Color LaserJet 2550Ln, Color LaserJet 2550n, Color LaserJet 2820, Color LaserJet 2840, Color LaserJet 3000, Color LaserJet 3000dn, Color LaserJet 3000dtn, Color LaserJet 3000n, Color LaserJet 3600, Color LaserJet 3600dn, Color LaserJet 3600n. With a yield of 20000 pages