The JPX cartridge holds two canisters filled with the active solution or with a marker available for training purposes. The filling volume is 0.28 fl. oz or 10 ml per canister. The cartridges are powered by a propulsion capsule.
Each cartridge offers 2 separate shots and must be replaced once spent. Depending on their payload the 2-shot cartridges are marked with a color coded lable. The patented cartridge design provides a unique self-clean mechanism cleaning the nozzle from residues, so that after you fire one shot, you aren't exposed to the residues from the fired barrel.