KNND Products Information:1. Material: Stainless Steel, Aluminum, Brass, Plastic, Carbon Steel...2. Process: CNC Drilling,Grinding, Broaching, Etching,Turning, Laser Cutting, Punching...3. Surface: Zinc-Plated, Hot Dip Galvanized, Polish, Painting, Lightly Oiled...4. Non-Destructive Test: Ultronsic Test, Magnetic Particle Testing, X-Ray..