5 x 1.9mm Cylindrical NdFeB Magnet - Silver (20PCS)
Diameter: 5mm; Thickness: 1.9mm; Tolerance: +/-0.1mm; - N35 nickle plated; - Magnetization direction: both N and S poles; - Operating temperature: 80'C max. - Application: speaker receiver mike alarm device stage and car audio device permanent magnet vacuum circuit breaker magnetic latching relay watt-hour meter water meter reed sensor etc.