Sizes: 219-620mmOD*20-50mm WT 2) Standards: GB/T, ASTM 3) Surface: oiled or black painted to prevent rust 4) Marking: as per customer's requirement 5)Steel Grade:10#,20#,45#,16Mn,Q345 B Outer packing: Wooden Cases Hexagonal shape bundles wrapped with strong steel trip or according to customers' requests
