... :stainless steel, alloy steel ,brass, bronze, copper, aluminum, plastic, or customer specified.3.Finishes: Anodizing, Electroplating, Polishing, Powder ... 4.Quality Assurance : IPQC inspect each during every step; 100% inspection before shipment by micrometer, height gauge, projector measuring ... meet DIN,JIS,ASTM,AISI,BS,GB standard plastic model car parts prototype or plastic bumper making prototype