The cartridges can be refilled again and again. After reinstalling the cartridges, the Auto Reset Chips (ARC) will reset automatically.;Users do not need to drill a hole to refill. There are rubber plugs on the top of each cartridge.;It is very easy to remove the plugs to fill the ink and replace the plugs after fillling.;The cartridges are transparent. Therefore, users can see how much ink they have filled in and avoid leaking.;We provide the professional Internet technical support 24 hours/day and 365 days/year.;The cartridges are filled with premium water-based photo dye ink. They are ready to use.