Continuous inksystem/CISS forusewith Epson T10/T11/T20/T20E/T21/TX100/TX101/TX300F/TX110TX200/TX209/TX400/TX409/TX210/TX410/TX550W printers. Continuous ink system cartridge No.: T0731N black ink cartridge, T0732N cyan, T0733N magenta, T0734N yellow. Product Advantage: 1.Easy installation:No need professional skill ,anybody can install it easily. 2.Environmentally friendly:No need to change ink cartridge,,can refill for many times,cost-effective and environmentally friendly. 3.Quality ink : Utilize high grade ink,which produces fluent printout,fine color,and never jam the printhead. 4.Cost-effective and convenient: New ciss system solution could save printing cost up to 90%. 5.Compatibility : 100% compatible with original ink cartridge. Note: 1. After installing the CISS Systems, do not move the ink tank unless it is necessary. 2.When you are printing,do not move the ink tank up or down. Keep it stable and at the same level as the printer. 3. Store at 15-35 degrees Celsius. 4.The ink and cartridge flow have been designed and tested to function as a system. We recommend you use our specially designed ink in the CIS for optimal results. 5.If the color mixing problem happens,check if a single color ink volume in the tank is much higher than the other color,the color volume differece should be less than 0.5cm.