Tech Master 5 Port Two Stage Diaphragm Cylinder Regulator FKM (VITON) Seal - for O2 and Inert Gases- Inlet <=300 Bar BS 341 No.3 - Outlet 0-10 Bar G3/8 BSP R/H Brass Male. Model No. GPT401-04-05-01-01 (GAS1043)