Aluminum Die Cast Speaker Parts 1) Material: aluminium 2) Process: die casting 3) OEM drawings and samples are welcome Detailed Product Description ITEM Aluminum Die Cast Speaker Parts Die casting mouldCavitySingle or multiple MaterialH13,DIEVAR,QDN,8407,2344V,TQ1,2343,SKD61,45#steel,etc.Heat treatmentHardened, NitridingHardnessHRC50~55Mould featuresAdvanced design, Logical structure, High ...