Mega Magnets – Set of Four 1″x 1/10″ Neodymium Magnetic Health Discs Gold-plated neodymium spot magnets. Strongest magnets available for deepest penetration. Medical tape is included. Perfect for treating sore spots on shoulders, hips, back, arms, knees, legs. These magnets are permanen and will not lose their strength. Keep magnets dry, this will prolong the gold-plated coating.