INKUTEN CISS Continuous Ink Supply System for WF-7610 Printer (for Sublimation Ink, Heat Transfer Printing) Empty & easy to fill with Sublimation ink. No need to repeatedly refill small messy cartridges. The ink tanks hold the equivalent of 40 cartridge refills. No need to turn off printer or remove cartridges to reset or refill as with small cartridges. 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. The empty DELUXE CISS System is super easy to refill using the provided syringes and needles. Just remove the plug, inject the ink, and put the plug back in. It's a lot easier than filling OEM cartridges.