Neodymium Block Permanent Rare Earth Magnet Super Strong 6 Size Choice Nickle (N52 60mmX20mmX10mm) Quantity:One Size:L x W x H  N52 :60x20x10mm,40x40x20mm N50 47x47x22mm,50x30x10mm N35 40x20x10mm,N35 50x25x10mm Under different temperatures,Size may not be 100% the same as ads. Hard, brittle, magnetic super powerful, so pls be careful.