Material:Carbon steel ASTM A234 WPB,ST37.0,Q235A,20#,16Mn,etc Size:1/2"-42" Type:Concentric reducer,eccentric reducer. Standard:ANSI,DIN,JIS,BS,UNI End:Butt-weld Wall thickness:SCH5-SCH160 and others you required. Strict quality control, competitive price, good service help our products sell very well in the overseas markets