We could supply the hot rolled and cold rolled pipe with the black and bright surface, refer to the size pls checking below: Circular pipe-OD: 8-325 mm Wall thickness: 0.5-14mm; Square pipe-from 8x8x0.5mm to 500x500x14mm; Rectangle pipe-from6x10x0.5mm to 600x400x14mm. SPEC: Q195~Q235B, Q345B, SS400 Standard:ASTM A500/DIN2394/2395/EN10219/GB/T6728-2002