The parts are made of aluminum alloy 6061 - T5 material, is the outdoor equipment parts. Product specification is 90 * 75 * 45 mm. We purchase material according to customer's drawings, engineers number program, the operator according to the first program debugging, after first article inspection, CNC precision machining, control the size tolerance + / - 0.02 mm. Processing after the completion of the inspection, after anodic oxidation dyeing again, after CNC removal of conductive oxide layer. Safe packing again after full inspection after shipment.