... ST37, ST45, ST52, E235, E355.Tube OD: 5-80mmTube WT: 1.5-8mmCondition: BK, BKW, BKS, NBK, GBK.Management standard: ISO9001 ... automobile parts, motorcycle part, shock absorber, hydraulic cylinder, and other cylinders.The tubes are slightly oil for anti-rust.Hexagonal bundled ... and reinforced wooden case packing for sea transportation.EN10204/3.1 mill test certificate is sent together with goods. EN 10305 ...