Epson 7400/9400 refillable cartridge

1.Refill ink conveniently and succinctly.
2.The balance equipment is inside the cartridge, prevent leaking the ink.
3.The filter can be replaced in the nozzle, prevent blocking the printer head.
4.The nozzle is replaceable.
5. Adopt the transparent material for the cartridge, can see the ink level anytime