aluminium frame: 1.OEM services,R&D speaker part mold 2.15 year experiences of speaker aluminium frame 3.Qualified machining Description:1. Name: ADC12 die casting speaker aluminium frame2. Technology: aluminium die casting3. Material grade: ADC124. Standard: ASTM, JIS,DIN,BS,NF5. Machining: drilling,tapping6. Finish: shot blasting,deburr7. Surface Treatment: powder coating8. Dimension: According ...