... speakers, earphones, sound emitters and other audio products. Product Name: various sizes of ndfeb magnets ISO/TS ... 16949 & ISO14001 & &QC080000 Certified.These products are widely used in speakers, earphones, sound emitters and ... suitable for electric motors, apparatus and meters, suctioninstruments, stationery, decorations and other applications. Features:1. φ3 ...