This is a slotted magnet series, the shape is bar, rectangle, the slotted position is in the middle, it belongs to customized magnet, the surface is black epoxy coated, it can protect the magnet better. Size, temperature resistance, performance level can be customized according to your needs, please provide some details if you need a quote.
Rectangular & bar neodymium magnet with grooves in the middle processing case;
More special custom strong neodymium magnet sample view: https://www.couragemagnet.com/irregular-neodymium-magnets/
Other grooved magnet types;