*** USED TONER CARTRIDGE MUST BE RECIEVED PRIOR TO REPLACEMENT TONER CARTRIDGE BEING SENT TO CUSTOMER *** Use in the following printers: Compatible HP models: LaserJet: 4Si MX, 4Si Series, IIISi MX, IIISi Series * Compatible Canon models: LBP-NX, LBP-NX 600 * Compatible Digital (DEC) models: PrintServer: 17, 17/600 * Compatible Newgen Systems models: Turbo: PS/440N, PS/440ND