King Arms Airsoft Green Gas Dual Pack Features: Manufactured by King Arms! Premium Green Gas, Lasts Over 1500 Shots! Be aware of receiving substitutes! For Use in Green Gas Powered Airsoft Guns Integrated Gas Injection Nozzle Prevents Leaks and Bleeding of Gas When Loading Gas Magazines Green Gas Has a Higher Gas Purity than Propane or Butane Environmentally Safe Propellant Silicone Oil Lubricant Added (Keeps Gun in Good Condition) NOT for Use with Airsoft Gas Guns Designed for Use with HFC 134a Gas Size: 8oz. Output Pressure: 110+/1 5 PSI at 70 F Pack of 2