This is a 1 inch diameter round black magnet, the material is sintered ferrite, the thickness is 3mm, more common, featuring cheap, high temperature resistance, magnetic stability is not easy to demagnetise, mainly used for refrigerator stickers, fire doors, handicrafts, personal DIY, if you need to buy in bulk, please send us an enquiry, we have a certain price advantage.
Note: Ferrite round magnets can help you distinguish NS poles by chamfering, marking, painting, making concave points and other marks.