Calibration Gas CGA Number 44ES-132-CP Container Type Cylinder Cylinder Capacity 44 L Cylinder Diameter 3.13 in Cylinder Height 10.64 in For Use With C-10 Gas Mixture Methane 99.999 Percent Gas Type Methane Product Type Calibration Gas Chemical Formula CH4 CAS Number 74-82-8 Background Gas Air Nitrogen Cylinder Material Aluminum Alloy Outlet Connection Size 5/8 In.-18 Outlet Connection Type UNF Standards ISO 9001 2015 Reusability Refillable Operating Pressure - Maximum 825 psi