size from : Industrial use CO2 cartridge Cylinder , be used in tyle refilling , gun ... for gift accessories Material : carb Industrial ... use CO2 cartridge Cylinder , be used in tyle refilling , gun ... for gift accessories Material : carbonsteel , size : ... Thread size :7mm color ,: chrome , zinc Filling Weight : 12G co2 gas packing :500pcs/carton , G.W 18kg ,