Neodymium magnets have a wide range of uses including Magnet Therapy. The pack includes:- 1 x 25 x 10 x 3mm, 2 x 12mm dia x 3mm, 1 x 10mm dia x 5mm, 1 x 10mm dia x 5mm Countersunk, 2 x 20mm dia x 3mm, 2 x 6mm x 1mm gold plated magnets. All are N38 Neodymium iron Boron magnets.