... Sample 4) OEM OK Anodized Aluminum Car Amplifier Cover/ Front Plate/ CasingSpecification:Material: Alluminum Alloy: 1x,2x, 3x, ... SizeSurface Treatment: Anodized, Power Coating, Sandblasting, Polishing, Grinding, Painting, Screen printing, Tumbling , Electroplating, Fabrication: Sawing, Deburing, Milling, Drilling, ... understanding of customer requirement./ Anodized Aluminum Amplifier Front Plate