The Crosman 12g Co2 Powerlet Cartridges are pre-filled, disposable 12 gram Co2 cartridges. These Co2 12 gram cartridges provide up to 30 shots using a paintball marker with one cartridge, or up to 200 shots using an airgun or airsoft pistol. They are ideal for any gas-powered air rifle, air pistol, airsoft gun, or paintball marker. Manufactured to the highest level of precision and quality, these cartridges meet and exceeds ASTM F590 standard consumer safety specification that is 100% tested for heat and burst safety during each production. They are available in a box of 25 cartridges. We recommend these Co2 cartridges for use with our Valken Co2 pistol magazines.