Silver Pebble Magnetic Wristband. This wristband features .999 Silver Plating on the popular Sabona pebble design. The plating is on the top only leaving Sabona copper next to the skin. Look for the 1700 gauss samarium cobalt magnet in each tip of the wristband! Sabona chooses Samarium Cobalt magnets for long term durability and rust resistant qualities. Sabona Copper Wristbands are made with the purest copper available (99.99% pure) All styles are designed for comfort and manufactured to maintain shape and quality appearance.