... 3 anodized & powder coated color aluminium tubeSpecificationsRound(Square) Aluminum Tube: 1)ISO9001:2008 2)CNC machining 3)Good quality ... : Cutting, Drilling, Punching, CNC machining, bending, etc 6,Shape: Square, Round, Flat, Oval, and according to customer's ... carton box different packing can be required by customersSpecificationsround aluminum tube,used for sound box with high precision and ...