This GRAINGER APPROVED reducing coupling is 316 stainless steel construction with a higher nickel content for better corrosion resistance.- Compatible with stainless steel Schedule 40 pipe- For use with air, water, oil, natural gas, and steam Pipe Fitting Material / 316 Stainless Steel, Stainless Steel Material Grade / 316 Class / Class 150 For Pipe Schedule / 40 Fitting Side A Nominal Pipe Size / 1 in Fitting Side A Gender / Female Fitting Side A Type / NPT Fitting Side A Outside Diameter / 1 in Fitting Side A Pipe Threading / 14 Fitting Side B Nominal Pipe Size / 3/4 in Fitting Side B Gender / Female Fitting Side B Type / NPT Fitting Side B Outside Diameter / 3/4 in Fitting Side B Pipe Threading / 14 Maximum Operating Pressure / 300 psi Max. Steam Pressure / 150 psi Overall Length / 50 mm Color / Silver Application / Air, Natural Gas, Non-Potable Water, Oil, Potable Water, Steam Standards / ASME B1.20.1