INKUTEN 4 Refillable (Empty) Cartridges for HP 920, HP 920XL, Auto Reset Chips (ARC) for OfficeJet 6000, OfficeJet 6500, OfficeJet 6500a, OfficeJet 6500a Plus, OfficeJet 7000, OfficeJet 7500a Printers The cartridge is transparent. It is easy to view how much ink left to prevent from lack of ink to cause air bubbles or how much ink filled in to avoid overfill for easy operation. There are easy-refill hole and rubber plug on the top of each cartridge. It is very easy to remove the plug for ink refill and replace it back after refilled for the easy refilling. Save hundreds of dollars. Just buy ink from now on. Compatible with dye, pigment, edible or sublimation inks. Empty set. Ready to be filled with your own ink. Brand new cartridges with chip. No more prying chip from old cartridges, Integrated filter to prevent clogging printhead. Designed to be filled and refilled hundreds of times. Auto reset chips installed. The ink level will reset to full once you refill the cartridge. For use in the following printers: OfficeJet 6000, OfficeJet 6500, OfficeJet 6500a, OfficeJet 6500a Plus, OfficeJet 7000, OfficeJet 7500a