This is a neodymium magnet with strong 3M adhesive backing exported to overseas customers these days, N52 high performance grade, shape is square, specific size is length and width of 12mm, thickness of 3mm, surface magnetic strength of 3000 gauss or so, according to the customer's requirements in the S-pole stickers, such as you have a neodymium magnet with adhesive backing welcome to ask us for quotations.
12x12x3mm square with adhesive back strong neodymium magnet sample display
12x12x3mm magnet pre-shipment inspection
Other shapes with 3M adhesive magnet