Features This Grainger Approved tee fitting features thicker walls that can withstand higher pressures than class 150 fittings. Model is suitable for air, water, oil, natural gas, and steam. Pipe Fitting Material / Malleable Iron Finish/Coating / Galvanized Class / Class 300 Fitting Side A Nominal Pipe Size / 1/4 in Fitting Side A Gender / Female Fitting Side A Type / NPT Fitting Side B Nominal Pipe Size / 1/4 in Fitting Side B Gender / Female Fitting Side B Type / NPT Fitting Side C Nominal Pipe Size / 1/4 in Fitting Side C Gender / Female Fitting Side C Type / NPT Includes Pre-Applied Thread Sealant / No Includes Seal / No Maximum Operating Pressure / 2,000 psi @ 150 Degrees F Standards / ASME B16.3, ASTM A197, ASTM A47, FM Approved, UL Listed