Standard: DIN2391, ST52 Specification DIN2391 Delivery Condition BKS Size: OD (30-360mm) x WT (3 - 25mm) Types : Cold Drawn Seamless Accuracy : Honing allowance in Inner Diameter 0.03mm to 0.05mm, Straightness 1mm in 1meter, Surface Roughness Ra Value. 1.20 Micron to 1.60 Micron and Free from pit, scale, Length in Random 4500mm to 5900mm or Fixed length as per requirement Application: Hydraulic Cylinder Tube for Swivel Crane, Injection Machine, Construction Machine, Material Handling Machinery and other Hydraulic Machinery Parts