Trinity Ink 4x100ml refill ink for T502 Expression ET-2700 ET-2750 ET-3700 WorkForce ET-3750 ET-4750 ET-4752 printers This ink kit doesn't come with refill instruction. But it's very easy to refill. You can just use the syringe to inject the ink into the ink tank.1. Refill Ink Kit (1 Black 1 Cyan 1 Magenta 1 Yellow) 2.Compatible: Expression ET-2700 ET-2750 ET-3700 WorkForce ET-3750 ET-4750 ET-4752 printers 3.International Certification: ISO 9001 and ISO 140001 4.100% Guarantee！ - No clogging jets for long jobs and continuous printing Increase productivity through high speed printingQuality: These inks are specially formulated and manufactured according to the strictest and highest requirement and specificatons. Our ink is filtered to <0.2 nanometer to ensure stable and fluent printing and to prevent print nozzle blockages. The Printed pictures offer a wide color gamut and vivid output. Also, the fade resistance is as good as the retail grade. Please do note these are compatible inks and they are not manufatured nor endorsed by HP, Canon or any other printer manufactures.
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