T126 Refillable Ink Cartridge for Epson Workforce 60/435/520/545/630/633/635... Pre-filled and ready to use Easy to refill simple plug on top of cartridge Clear plastic so you can see the ink level clearly ARC Auto Reset Chips, remove cartridge, refill, replace, resets to full Can be refilled over and over again save up to $$$ 90% $$$ or more on ink cost