negative ion magnetic energy necklace 1)food grade silicone mix with ion&infrared 2)with magnet clasp with high quality 3)OEM Product name: negative ion magnetic energy necklacenegative ion necklace silicone rubber ion necklacesilicone rubber necklacepower energy silicone necklaceenergy balance necklace Form :1, material:100% silicone (food-grade, safe environmental protection)2, Length:50cm * 0. ...