Can be used for removing ink clogging & fixing printing problems like broken printing. The contents of this kit are colour coded syringe with blunt tip needles - 4nos , suction syringe – 1 no, suction holder for color & black cartridges - 1 each, tissue paper -2 nos, gloves - 2nos & color identification sticks-3 nos. Just peel the sticker on top of the cartridge, you will find holes for refilling the cartridge, take ink in the respective syringe and inject as much ink as the sponge inside the cartridge can absorb, then paste the sticker back. If ink is not coming out properly through the nozzle even after refilling, then 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.