high pressure valve made in  Italy. Different types can be available.

cylinder can be applied to the following gases

carbon monoxide, carbon tetrafluoride, nitric oxide, sulfur hexafluoride, methane,ethane,
propane, silane,germane, ethylene oxide, ethylene, propylene, helium,argon,nitrous oxide,
carbon dioxide,fluoromethane,difluoromethane,trifluoromethane, welding gas, special gas,
medical gas, electronic gas,industrial gas,calibration gas,etc

a wide variety of cylinders are available, ISO,DOT standard,EN standard,etc.