Model "1000HP" Pressure Reducing Regulator,Tfe Gaskets (Opt-45); 1-1/2" Size,Gaseous Jet; Bronze Body & Spring Chamber; Bk Trim: Brass Cylinder & Plug With Fluorocarbon Elastomer (Fkm);Seat And Diaphragm; Npt Screwed; 60-100 PSIG Range Spring; Opt-55: Cleaned For Oxygen Service Per Spec #S-1134