Tungsten ring has been referred to as "Permanently Polished Rings". Each championship ring is individuallyhandcrafted using assorted diamond abrasives and polycrystalline diamond tooling. It is cobalt-free.
Tungsten ring has the high corrosion resistance. By synthetic perspiration testing, it is totally not corrosive, not fade and not change in color, not allergic, not rust.
Please do not hesitate to contact us if you have any question. Our e-mail address is sales@chinatungsten.com sales@xiamentungsten.com. Alternatively, you can call us : 0086 592 5129595/5129696/5127878.