New Sherwood CO2 valve with CGA320 outlet and 1.125" -12 UNF inlet. Sherwood is the undisputed leader in compressed gas valves. The extensive list of quality features and testing in each valve includes: Heavy-duty forged brass body Precisely machined internal components Unitized plug Pressure Relief Device (PRD) Metal-to-metal seal below bonnet threads Direct-drive stem design with optimized O-ring seal 100% helium leak tested Automated assembly and testing ensures exceptional quality. Valve must be installed by a qualified cylinder technician.