5-pack of Genuine Crosman CO2 Powerlets.Crosman set a new standard for air guns when we introduced CO2 as a power source in 1931.Crosman Powerlet 12-gram CO2 cartridges provide you with a snug fit and solid seal for a reliable, consistent performance with almost any gas-powered gun.Crosman Powerlets are the only 12g caplets we are aware of that have a small amount gun lube installed at the factory to make it easier for your CO2 gun to last longer.