DoorStepInk Remanufactured in The USA Ink Cartridge Replacements for HP 21XL 21 XL Black 2PK for Deskjet F2280 F370 F4135 F4194, OfficeJet 4315v J3608 J3640, PSC 1410xi 1406 Fax 1250 3180

Since 1997, DoorStepInk has been leading the way in American made high quality remanufactured ink cartridges. Every single cartridge we remanufacture is completely cleaned from any old ink residues. The cartridges are filled to O.E.M capacity using the highest quality ink formulated in the USA and print tested for quality assurance using the most advanced inkjet equipment. Advantages when buying a DoorStepInk Remanufactured Ink Cartridge High Quality Guaranteed Meets O.E.M page yield Good for the Environment Support a U.S. Manufacturer.