Strong Magnet:GM-602 1) Used For:siren,driver unit,speaker,horn speaker 2) Stable,Ferromagnetic 3) ODM/OEM ... 10mm/12mm/15mm5) Used For:siren,driver unit,speaker,horn speaker Product Characteristics:1) with high quality at competitive ... speaker&siren&driver unit magnet5) with excellent after-sale service to guarantee customers' benefits MG-602, strong siren magnet,driver unit magnet,speaker magnet ...