INKUTEN HP Ink Refill Tool for 952 952xl Ink Cartridges for HP OfficeJet Pro 8710 8720 8730 8740 Printers You are looking at the best HP Ink Refill Tool/solution on the market currently. This tool allows you to use your existing HP Brand cartridge and fill it up with ink, without drilling, holes, or anything else. Kit includes 4x Cannula Adapter Needle and 4x 10ml Syringe, the only thing you need to supply is the quality ink and you can refill indefinitely. This tool allows you to add ink and remove oxygen from the cartridge, and get the optimum pressure needed for the best printing quality. Compatible With: HP OfficeJet Pro 8710 8720 8730 8740 Printers Make sure to purchase high quality ink as inferior inks will clog the print heads, we recommend INKUTEN.