Bavvo&reg; Remanufactured ink Cartridge for HP 61XL(Black) use in HP Officejet 4635 Printer - Pack of 2 Pack of 2 Black Ink Cartridges 1 year replacement warranty,30-day refund guarantee after the purchase. Replacement for Original Model: HP 61XL (CH563WN) Compatible Printer: HP Officejet 4635