Neo-Mag Neodymium Gold Plated 12,300 gauss magnets - 4 piece assortment kit of strongest magnets available for pain control or pressure points, place the magnet directly over the pain for maximum results. The kit includes 1 - 1" x 1/8" and 3 - ½" x 1/8" 12,300 Gauss neodymium magnets. Popular for the shoulder or upper back, arms, legs, knees, neck, hips. The kit includes sample medical tape to allow the magnets to be applied in the conventional manner or you may place one magnet against the skin and a second magnet or coin outside the garment to hold it in place. Use the North polarity (smooth side of the magnet) against the body for therapeutic effects. Instructions included. These magnets are permanent energy and will not lose their strength. Keep magnets dry, this will prolong the gold-plated coating.