We are offering honed tubes.Standard: din2391, st52 specification din2391 delivery condition bkssize: od (30-360mm) x wt (3 - 25mm) types : cold drawn seamlessaccuracy : honed and polished in inner diameter as per iso h8, h7, straightness 1mm in 1meter, surface roughness ra value. 0.20 micron to 0.40 micron and free from pit, scale, length in random 2000mm to 2500mm or fixed length as per requirementapplication: hydraulic cylinder tube for swivel crane, injection machine, construction machine, material handling machinery and other hydraulic machinery parts.