Tourmaline knee warmer 1)OEM,ODM and R&D serive 2)ISO 9001:2008 3)Delivery within 3 days after your payment Tourmaline knee warmer/Knee support with bio magnet/Magnetic knee pad/Magnetic knee support/Magnetic knee protector Our factory is located in suburbs of Tianjin, we attaches great importance to the business principle of good faith.Meanwhile,we continue to commit the development of nano ...