Because they are both circular permanent magnets, Alnico Alloy Discround Block Ring magnets and disc magnets may appear very similar at first glance. However, there are some significant variations between these two types of magnets in terms of structure, magnetic field direction, and typical uses. A ring magnet is a circular magnet in the shape of a doughnut with a hole in the centre, similar to a ring. Contact info:- Ningbo Magnet Co.,Ltd. Address: No.51 Mianfeng Road, Mianfeng village, Zhenhai, Ningbo, 315100,china Email: [email protected] Skype:ceci5559 Tel: 86-0574-27877947 Fax: 86-0574-27877948