ND LC101 LC103 LC105 LC107 LC109 Refillable Ink Cartridges CISS with Auto Reset Chip+4X250ml Ink Refill Kit for Brother MFC-J4310DW MFC-J4410DW MFC-J4510DW MFC-J4610DW MFC-J4710DW MFC-J6920DW Printer The cartridge can be easily refilled and reused again and again. There is easy-refill hole and rubber plug on the top of each cartridge. It is enviromental friendly green inkjet product - Save our earth with a much less cost. The cartridges are transparent. It is easy to view how much ink left.