Ink4work Set of 2 Pack Remanufactured HP 901XL Black Ink Cartridge For HP Officejet J4524, J4540, J4550, J4580, J4624, J4660, J4680, J4680c, 4500, G510a, G510g, G510n Set of 2 Pack Reconditioned HP 901XL Black Ink Cartridge Combo. We offer a 100% Quality Satisfaction Guarantee. Sold by ink4work Not made by HP