This machine specially designed for the headset speaker manufacturers, can charge the earphone diameter for 13mm. 15mm. 16mm and 20mm, by 13 by 15 by 16 by 20, good magnetizing effect and magnetizing more each charging. Magnetizer & Magnetizing Fixture Purchase Guide: We should determine the magnetizing coil (or fixture) according to the magnet to be processed. And the property of the magnet determines the magnetic strength of the magnetizing coil (or fixture), we determine the capacity of the magnetizer according to the magnetic strength required. So, if you want to purchase our products, please tell us the following information. We can recommend most suitable products for you precisely and rapidly. For special specification products, we can customize them for you. 1, Material of Magnet (bHc, jHc, BH product, Jr) 2. Shape and Size of Magnet 3, Pole Numbers and Directions 4, Saturation magnetization or fixed-quantity magnetization? 5, Charge Speed Requirement 6, Is the magnetizer for independent use or matching with production line? 7, Sole magnet magnetization or assembled magnet magnetization? (For assembled magnet, you should tell us the total size of the part) 9, Application of the Magnet