Compatible for HP 49 Ink Cartridge This new SUSA Premium Compatible Ink is designed to work with your HP Laser Printers and is a replacement for HP 51649A Toner Cartridge. SUSA's Compatible Toner Cartridges are engineered to meet the highest standards of quality and reliability. The yields of these cartridges either meet or exceed OEM standards and are conform to ISO 19752 Page Yield Testing. SupplyUSA's 51649A replacement toner cartridge is a high quality, cost-efficient alternative to the pricier HP OEM. Shelf life: 12 months.