Seamless Carbon Steel Elbow: 1.Item: Seamless Carbon Steel Elbow 2.Material: carbon steel 3.Size :1/2"-48" 4.Wall thickness:SCH20, SCH30, SCH40, STD, SCH80, ... 5.Standard: ASTM,DIN,JIS GB standard, and so on 6.Packing:wooden case,pallet,or according to custom's requirements.