... Aluminum/SS/mild steel/Alloy steel/copper, etc Max. 1.8 meters product, US standard CNC machining, Processing, Machining1. Material: Aluminium, Stainless ... , mild steel, alloy steel, cooper, brass etc.2. Max. 1.8 meters product is acceptable.3. Smooth Finish: U.S. Standard (0 ... .80 to 8.00 micrometers)4. Tolerance: from 0.05mm to 0.001mm ...