black steel equal/reducing tee Material WPB A234 ST37 ST35.8 Standard ASTM ... ANSI B16.9, DIN JIS black steel equal/reducing tee MaterialWPB A234 ST37 ST35.8StandardASTM ANSI B16.9, DIN ... , JISSpecificationL/R(S/R) 45\ 90\ 180 Elbow , Tee, Reducing tee, Concentric reducer,Eccentric reducer ,Cap etc.SrufaceGalvanized, Black paint, Transparent ... long terns basis.CERTIFICATE black steel equal/reducing tee