1) ItadoptsNo-sponge structure to avoid damaging the printer head because of cartridge aging. 2) Innovate it on the basis of first generation, making sure there is no ink leaking, print spog, block etc when printing. 3) Offered with latest versionV6.0N4 COMBO Chip, and work on the latest Epson printer models:T11/T10/T20/T20E/TX100/TX101, TX210/TX410/T40W/TX600FW, T23/TX115, T26/TX106/TX109, T30/T33, TX700W/ T50etc.