20mm x 10mm With One 4mm Countersunk Hole Neodymium Rectangle Magnets N35 Grade
Very Strong 20mm x 10mm x 3mm With a 4mm Countersunk Hole, Rectangle Neodymium Magnets. N numbers range from N27 - N52. 3mm with 4mm countersunk hole. Neodymium is about as common as tin or lead. Neodymium Magnets.