The materials we use are supplied from large and high reputed steel mill in China,so we can guarantee the quality up to yours. Detailed Product Description 1. Item: Deformed Steel Bars2. Standard: GB, ASTM, BS, 3. Material: HRB335 / 400 / 500, BS4449, ASTM A615 Grade 60, AS/NZ 4671:2001.4. Specification:Diameter: 8mm~40mm, Length:6m,9m,10m,12m, Special lengths and diameters on request. 5. ...