Specifications of Continuous Ink System (CISS) for Epson T50 /TX700W/TX800W 1) To be used on Epson Cartridge(T0821N-T0826N) 2) Offered with newest vesionV6.0N4 Combo Chip. 3)AT75ML inktank,ABS material,high quality. 3) Easy setup for long-term usage 4) Designed to perform with maximum reliability, efficiency and ease of operation 5) Cuts the running costs of printers by 90% because the same ink tanks can be used over and over again