SmCo Magnet ; Grade: Sm2Co17; Working temperature : 350 ℃ Size: D12x10mm; Tolerance:12mm +/-1 mm; 10+/-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