Specifications: 1) Size range: 10.0 - 114.3mm (O.D.) x 1.5 - 13.49mm (W.T.) 2) Heat treatment: spheroidize annealed 3) Standards: ASTM 4) Max. hexagonal bundles: 2,000g, with several steel strips 5) Smooth surface, uniform mechanical property, tight tolerance, steady microstructure Inner packing: Two tags on each bundle Outer packing: Bundles wrapped in PVC sleeve and sackcloth with several steel strips with one tag tied on the outer package