aluminum frame: 1.OEM services,R&D speaker part mold 2.15 year experiences of speaker aluminum frame 3.Qualified machining Description:1. Name: die casting speaker aluminum frame2. Technology: aluminum die casting3. Material grade: A3604. Standard: ASTM, JIS,DIN,BS,NF5. Finish: shot blasting,deburr6. Dimension: According to customer's drawing or sample7. Certification: ISO9001:20008. Application: ...