Matheson Tri Gas Model MSRS-1455-BO 2 Cylinder Manifold Header with four (4) Valves. One end of the manifold has a GFP 316L Valve, the other end has a 3500 psi HPV LMF4374B 316L Valve, The two center valves are the same and marked made in Luxembourg and D20030012 05/10 CGA346 08N PC. Overall length of header is approximately 23".