Lexmark International Products - Ink Cartridge, for X3550/X4550/X1420, Black - Sold as 1 EA - Ink cartridge is designed for use with the Lexmark X3530, X3550, X4530, X4550 and Z1420. Nonrefillable cartridge is licensed for single use only. Return empty cartridge only to Lexmark for remanufacturing, refilling or recycling. This product is by Lexmark