INKUTEN TM - 4 (Empty) Refillable Cartridges for HP 940 940XL with Auto Reset Chips ARC - for use in OfficeJet Pro 8500, 8500a, 8000 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. Save hundreds of dollars. Just buy ink from now on. Compatible with dye, pigment or sublimation inks. 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. 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. For use in the following printers: OfficeJet Pro 8000, OfficeJet Pro 8500, OfficeJet Pro 8500 Wireless, OfficeJet Pro 8500a, OfficeJet Pro 8500a Plus