Umarex USA 12g CO2 Air Gun Cartridges - 30 Count - Specially made with close attention to tight tolerances, the Umarex 12-gram CO2 cartridges have uniform neck dimensions. That makes it more likely that every cartridge will pierce properly and gas will be evenly dispersed into your air gun. 12-gram CO2 Cartridges 30 Count Originally Branded As Walther (Imported by Umarex)
