Single pair of Biomagnetism grade small neodymium magnets, perfect for balancing pairs on the head, neck and body.
 
Black leather (-ve face) and red leather (+ve face), with reinforced gluing.
 
Internal magnet measurement: 25mm dia x 5mm
Finished magnet measurement: 75mm x 50mm x 12mm
Holding Force: 9.3kg
Performance: 2200 gauss