ND &trade; Brand Dinsink 5X30ML(2BK+1C+1M+1Y) refill ink kit for HP901 901xl cartridge:OfficeJet G510aOfficeJet G510gOfficeJet G510nOfficeJet J4524OfficeJet J4540 OfficeJet J4550OfficeJet J4580OfficeJet J4624OfficeJet J4660OfficeJet J4680 OfficeJet J4680cOfficeJet 4500...The item with ND Logo! ND Brand refill ink for HP 901 901xl ink cartridge The item comes with detail refill instruction. You can refill ink for your original ink cartridge. It is a big saving. Highest UV resistant rating on market 5X30ML Black and Color ink This ink quality is same as OEM ink