... Design,Quick Sample 4) OEM OK Brushed Aluminum Cover for Car Power Amplifier Specification:Material: Alluminum Alloy: 1x ... , extruding, surface treatment, welding and assembling, and a "A Package Plan Solusion" from design, drawing, development, production ... design and manufacturing experience along with a thorough understanding of customer requirement./ Polished Aluminum Cover for Car Amplifier