Specifications: 1) Sizes: 54 x 80mm to 72 x 100mm 2) Standards: GB/T 10, 20, 35, 45# 16Mn 3) Surface: oiled or black painted to prevent rust 4) Marking: as per customer\'\'s requirement Inner packing: Caps on two ends of every pipe Outer packing: In hexagonal shape bundles wrapped with strong steel trip 2MT/bundle