Product Description   Basic Info. of Our Customized CNC Machining Parts Quotation According To Your Drawings or Samples. (Size, Material, Thickness, Processing Content And Required Technology, etc.) Tolerance  +/-0.005 – 0.01mm (Customizable) Surface Roughness Ra0.2 – Ra3.2 (Customizable) Materials Available Aluminum, Copper, Brass, Stainless Steel, Titanium, Iron, Plastic, Acrylic, PE, PVC, ABS, POM, PTFE etc. Surface Treatment … Continue reading China supplier China OEM Wholesale Customized Steel Flange Coupling Mild Steel, Carbon Steel, 4140, 4340, Q235, Q345b, 20#, 45# flange coupling