SmCo Magnet ; Grade: SmCo5; Working temperature : 250 ℃ Size: D15x5mm; Tolerance:15 +/-1mm;5mm +/-0.5mm Application : Sensor; No plating; By Euke MagTech Ltd; Learn us more , please visit: www.cmsmagnets.com ; www.euke-permanentmagnet.com contact us at sales@cmsmagnets.com