The contents of this kit are black ink -120 ml, syringe with blunt tip needle – 1 set, suction/prime holder - 1 no. Red Star ink is fully compatible for refilling the used ink cartridge. The chemical properties such as viscosity, surface tension, specific gravity & color tone are same as original. Red Star ink is perfect for hassle-free refilling of ink cartridge. Open the lid of the cartridge using a sharp devise like a screw driver/knife, take ink in the syringe, just fill it and paste the lid back. Put the cartridge in the suction holder and suck one or two ml ink using the suction syringe. Only cartridge in a good condition can give good prints after refilling.