Our bottles are designed for direct filling into your CIS/CISS or refillable cartridges. You can also use this ink to fill OEM cartridges but you must know how to and you must have your own tools to do so as we don't provide additional info for refilling OEM cartridges. Our ink is specific according to OEM cartridge number (not universal ink). Our ink also has the same standard as OEM which includes colors PH surface tension viscosity and filtration. Our ink is 100% UV resistant which prevents colors from fading.