... hub for bicycle various colours are available6061-T6 aluminum alloy cnc machine produce1.Material: The part showed is made up of ... aluminum alloy.2.Standard: DIN, ASTM,BS, JIS,ISO 9001, etc.4 ... & forging etc.Machining: complete machining line such as Machining center, CNC, Lathe, Milling machine,drilling etc.Surface treatment: painting, polishing, heat ...