Model PGR-2, Pilot Operated Pressure Reducing Gas Regulator; 3/4" Line Size; Carbon Steel Body And Cover Dome; Sj Trim: 316SST Trim With Bc Seat And Diaphragm,;Pilot Has Bc Ball (For Spring Range 90-200 316SST Ball), Neoprene;(Bc) Diaphragm, Stablizer Has Tfe Seat, Neoprene (Bc) Diaphragm; Mates With ASME 150 Flanged End Connections (14" Face To Face); 13" - 41"Wc Range Spring; Self Contained Sensing, Brass Fittings, Copper Tubing