Three usages for Refillable cartridges 1.Refillable cartridge + Compatible chip + HP-2 Chip resetter Attention:Bundling air tube by wire 2.Refillable cartridge + Decoder for HP 5100 Attention:Bundling air tube by wire 3.Decoder + Refill ink bottle + Refillable cartridge Connecting Refillable ink bottle and Refillable cartridge by tube,one side of tube insert into refillable ink bottle,the other one insert into refillable hole in refillable cartridge