*** USED TONER CARTRIDGE MUST BE RECIEVED PRIOR TO REPLACEMENT TONER CARTRIDGE BEING SENT TO CUSTOMER *** Use in the following printers: Compatible HP models: LaserJet: 4L, 4ML, 4P, 4MP * Compatible Apple models: Apple LaserWriter 4/600PS * Personal LaserWriter: 300, 320 * Compatible Canon models: LBP-430, LBP-430W, LBP-PX