Nar Cartridges's HP 91 series Compatible high yield ink cartridges are guaranteed to meet or exceed original HP printer cartridges in both print quality and page yield. Our ink cartridges have been engineered to create consistent, high quality images. Our HP 91 series Compatible ink cartridges are made with the highest quality new and recycled components in ISO9001 / ISO14001 certified factories. Nar Cartridges offers 100% OEM compatible inks and a lifetime performance guarantee.