QINK 6 X 30ml Refill Kit Ink for 564 XL Ink Cartridges for PhotoSmart 7520 5520 6520 5510 7510 5524 6510 6525 7525 OfficeJet 4620 4622 Contents: 30ml 564 564XL Refill Ink Refill for: 564XL Inkjet Cartridge Packing: 3 Black, 1 Magenta, 1 Cyan, 1 Yellow, 1 Drill 100% Satisfaction Guaranteed. We stand behind every product we sell and offer a 100% satisfaction guarantee for a full refund (excluding shipping costs) of the purchase price within 30 days. Defective cartridge can be exchanged within 90 days. 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