... steel tube corners2. feature: steel tube corners , tube fitting elbow , tube steel fitting3. machining: CNC lathe, auto lathe, milling4. Finish: anodizating,plating, painting etc.5. packing: carton ... by different materials, including alloy, stainless steel, copper, aluminium, etc.Our machinesCNC lathes ... desgin steel tube corners , tube fitting elbow , tube steel fitting 90 degree steel tube corners