Bavvo&reg; Remanufactured ink Cartridge for HP 950XL(Black) use in HP Officejet Pro 8600 Premium Printer Color: Black 1 year replacement warranty,30-day refund guarantee after the purchase. Replacement for Original Model: HP 950XL((CN045AN) Compatible Printer: HP Officejet Pro 8600 Premium Not fit for the printer which produced after March, 2015. And also not fit for the printer which you have upgraded the firmware to FDP1CN1502AR.