Premium Remanufactured W1480X (HP 148X) Black Toner Cartridge fully compatible with the HP LaserJet Pro 4001, LaserJet Pro 4001DN, LaserJet Pro 4001DW, LaserJet Pro 4001N, LaserJet Pro MFP 4101, LaserJet Pro MFP 4101DW, LaserJet Pro MFP 4101FDN, LaserJet Pro MFP 4101FDW. The use of compatible supplies does not void your printer warranty.