Guy's Magnets 5 mm x 1 mm N55 (FIFTY FIVE) highest grade neodymium disk

+/-0.1mm manufacturers tolerance on any dimension Magnetised through the thickness so that one flat face is north and the other is south N55 is the highest grade of neodymium magnets available. Be warned! They are strong and they will take you by surprise. N55 is approximately 5-6% stronger than N52 magnets the same size.