Product Name: various sizes of ndfeb magnets Widely used in speakers, earphones, sound emitters and other audio products. Product Name: ... TS 16949 & ISO14001 & &QC080000 Certified.These products are widely used in speakers, earphones, sound emitters and other audioproducts. They are also suitable ... . Features:1. φ3 up to 220mm2. High grade can be used, such as N38SH, N38, N42, N45, N40H, N42H, N523. ...