The first stage features a large arm design that improves both the efficiency and regulation. Combines with the second state regulator the over-all performance assures a smooth and continuous flow of gas to all appliances. This regulator is made by JR Products. It is the same as the 9950 From Fairview fittings. SPECIFICATIONS: Zinc Die Cast Fabric reinforced high pressure and second stage diaphragm. Underwriters Laboratories Listed 2nd stage relief mechanism per U.L. 144. Mounting holes 3-1/2? on center. BTU capacity (propane) 160000 BTU/HR Inlet 1/4? FPT Outlet 3/8? FPT Dimensions: 5-1/4? L x 3-1/8? W x 2-5/8? D Weight: 1.09 lbs.