High Strength Equine Blue Magnetic Bell boots features powerful Unipolar Neodymium Magnets with a gauss rating of 12,300 gauss. North pole Magnets are approx 3/4" diameter. Sold in Pairs, 5 magnets per boot. The Magnetic Therapy bell boots are constructed with the North-Negative pole of the Unipolar Neodymium Magnets facing the horse. The North-Negative (also referred to as South-Seeking) pole has beneficial effects on the body. Magnetic Therapy has been proven effective to speed healing by increasing blood flow, reducing inflammation and easing soreness. The Magnetic Therapy bell boots have a 1000 denier polyester outer covering, foam padding and soft poly-fleece lining. Adjustable Velcro closures - one size fits most.