Turbo Refill Kit is a cost effective product for refilling your used inkjet printer cartridges. It is very simple and easy to refill your cartridge using Turbo refill Kit.Refill Kit Contents: Fade resistant, dye based Black ink in 30ml bottle – 2 nos. Syringe & needle – 1 set.TURBO Refill Kit was introduced in the year 2000 and is having thousands of satisfied regular customers across India. The trade mark registration no. is 1316796 dated 21-10-2004.Specialities:•Easy to refill•90% cost savings•Trusted & Proven product since 2000•Fade resistant, dye based ink. •Special grade ink for each model. Refilling procedure : A black HP ink cartridge is a plastic shell with a piece of sponge in it. The sponge is used to store ink in it. Refilling means putting sufficient ink into the sponge so as to reuse the cartridge. There is a sticker on top of the cartridge. When you remove that sticker you can see a small hole and through that hole you can see the sponge. Take ink in the syringe and inject as much ink as the sponge can absorb, through that hole. Fix the sticker back. Now your cartridge is ready to use. Do not touch the copper PCB & head/nozzle of the cartridge while refilling. Follow the detailed instruction printed on the box.