Pure Copper Magnetic Heavyweight Cuff Bracelet for Men, with 8 Magnets 3500 G…
(99.9% pure copper, LEAD / NICKEL FREE, 3500 GAUSS pure neodymium magnets). ENHANCED MAGNETIC STRENGTH: Features 8 PCS neodymium magnets of 3500 gauss each. So if your bracelet turns green, it's normal and proves that the bracelet is made of pure copper.