ESTON 920 920XL Refill Ink Kit (3 x 30 ml Black) Packing List: 3 x 30 ml Black Refill ink + Thumb Drill + refill instruction More feature : 1.High color saturation,high fidelity. 2.Ultrafiltration,no clogging caused. 3.Weak acid or alkalescent formula,no corrosion problems. 4.No bleeding,no smear,high print quality. 5.Quick dry formula,satisfaction at high speed printing. 6.Water base formula,no toxicity,no chemical hazards,no environment pollution This kit will refill your cartridge : 920: Each bottle can refill about 7-8 times. 920XL: Each bottle can refill about 3-4 times Compatible with Printers: OfficeJet 6000, OfficeJet 6500, OfficeJet 7000 GUARANTEED : If for any reason you are not satisfied with our products, you can return or exchange within 2 weeks of receiving shipment. Your purchase is covered by a 1 year replacement warranty if the product doesn't work well.