Professional continuous ink delivery system for Ep7700/9700/7900/9900 series printer
 Best Solution for epson air pressur  cartridges system.
 * High performance cartridges insdie ink bag with permanetn chip
* Reliable performance like original cartridges , worry-free operation,once inside ink bag ink level less 350ml,the bulk ink system will fill ink automatic to cartridges for700ml. such repeat to work ,so you only need keep reservoir ink full.
* 1.5 liter ink volume per reservoir /700ml cartridges
*  Minimum user intervention.*BIS will maintain a constant ink level in the ink supply cartridges, which will guarantee a steady pressure inside of the print heads, a continuous uniform drop mass and as such permanent print quality!