1)size"4" 2)standard:ASME B16.9 3)WT:SCH10-160 4)material:carbon steel 5)API,ISO,CE,etc but weld seamless carbon steel elbow BE 4" sizeSeamless:from 1/2" to 24"Welded:from 24" to 96"( or as customer requirements)degree22.5 deg, 30deg,45 deg,90 deg,180 deg,1.0D, 1.5D, 2.0D, 2.5D, 3D,4D,5D,6D,7D-40D.thicknessSCH10,SCH20,SCH30,STD SCH40,SCH60, XS, SCH80., SCH100,SCH120, SCH140, SCH160, ...