This high-quality HP C4127X Compatible Toner replacement cartridge. 10,000 PAGE HIGH yield. Compatible with the following models: Hewlett Packard LaserJet 4000, Hewlett Packard LaserJet 4000N, Hewlett Packard LaserJet 4000se, Hewlett Packard LaserJet 4000T, Hewlett Packard LaserJet 4000TN, Hewlett Packard LaserJet 4050, Hewlett Packard LaserJet 4050N, Hewlett Packard LaserJet 4050se, Hewlett Packard LaserJet 4050T, Hewlett Packard LaserJet 4050TN 3-Month Warranty Free Shipping