Valken Green Gas canister lasts over 1500 shots! Easy to carry on the field Stable and safe to use Ready to go right out of the box; no mixing necessary Can be used with all airsoft green gas-powered guns Powers your green gas airsoft guns while lubricating with silicon oil Hazmat fee already included in the price In the Box 12x 8 oz. Valken Green Gas Canisters Specifications: Output Pressure 115 +/- 5 PSI at 70deg FCanister Size 8 ozSafety Data DOT-E 11917Shots per Canister 1500 - 2000 shots (Varies depending on temperature and type of gas gun)Compatibility Most gas-powered airsoft guns (KWA, KJW, WE, SRC, HFC, UHC, KWC, Cybergun, Y&P) California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov