ESTON 61/61XL Premium Combo Ink Cartridge Refill 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 The refill ink kit can refill : 6 times for 61 Black Cartridge; 8-10 times for 61 color cartridge Compatible with Printers: DESKJET 3512 1512 1000 1010 1050 1051 1055 1056 2050 2510 3052A 3511 E-ALL-IN-ONE 1510 2512 3000 3050 3050A 3051A; ENVY 5530 E-ALL-IN-ONE 3054 3056A 3510 3516; OFFICEJET 4635 E-ALL-IN-ONE 4632 E-ALL-IN-ONE; Officejet 2620 2622 2540 1510 2510 1010 4630; ENVY 4500 / 5530 ; officejet 8040; officejet 8045; officejet j486 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.