... ,Black Malleable Iron 1.Banded,Beaded,Plain 2.1/8-6 inch 3.Connection:NPT thread 4.Heavy/Standard/light M&F ... Equal Elbow, NPT, Black Malleable Iron Specification:Male&Female, Equal, Elbow, Connection ... NPT threads, Material of Construction Black Malleable Iron,WOG (PSI) 300 At 150 Deg F, Saturated Steam Pressure ...