Material: CK45stainless steel, alloy steel and special steel. Size range: Outside diameter: from 12 to 500 mm Max length: 16 meters Supply condition: Chrome plated Chrome thickness: 20 TO 50 Micron Surface roughness: Ra 0.2 Micron Outer diameter tolerance: ISO f7 Ovality: Half of the tolerance ISO f7 Straightness: 0.1mm/m Corrosion resistance: Test in natural salt spray according to ASTM B 117-72 hours. Packing: Anti rust oil to be spread on rod surface and each rod to be packed in paper roll and then in wooden box or plactic bag.