Adapter Application Air Fuel Natural Gas Fitting Side A Connection Type Press-Fit Fitting Side B Connection Type FNPT Fitting Material Carbon Steel Fitting Side A Pipe Size 1 1/2 in Fitting Side B Pipe Size 1 in O-Ring Material HNBR Specific Fitting Shape Straight Adapter Finish/Coating Zinc Nickel-Plated Overall Length 3 21/32 in Maximum Operating Pressure 125 psi Maximum Operating Temperature 180 Degrees F