Converter HP 56/57

Got too many HP 56 and 57 cartridges?Convert them to HP 21 and 22 with our new Cartridge converter. The best part is that you can refill them with up to 18 ml of ink!Simply plug the converter with a USB cable to any printer or computer. (USB Cable NOT included)Insert the cartridge into the cartridge slot on the converter.After 1-2 seconds, it is done! IMPORTANT: Please note that the converted ink cartridges will work only in regular printers that use HP 21 and 22 cartridges. The converted cartridges will NOT work on HP multifunctional printers.