Magnet:GM-45 1) Used For:siren,driver unit,speaker,horn speaker 2) Stable,Ferromagnetic 3) ODM/OEM Service 4) RoHS ... 22*8, Y30 5)Used For : siren , driver unit , speaker, horn speaker Product Characteristics:1) with high quality at competitive price2) with ... permanent type3) with powerful magnetic properties4) widely used as speaker&siren&driver unit magnet5) with excellent after-sale service to ...