Material: 1. 100% Made From Fisrt Hand Original Empties! Good chip and Printhead. All empties already been test by Empty Cartridges Tester. 2. With XL Capacity and New Sponge New Technology: Chip Reset for hp121 XL ink cartridge. remanufactured ink cartridge can show ink level. Printer warning light no blinking. Certificate: ISO9001/ ISO14001 Factory Show: Guarantee: .All of our products are 100% pre-tested. .All remanufactured ink cartridges pass the electronic circuit test and printing quality test to meet the original specification. .Warranty: 24 months .Customer Complain : We will confirm and replace or refund one by one for the defective goods. Shanghai Yousheng Printers Consumable CO., LTD--- Compatible cartridge for hp 121 ink 121 XL