Coolman black tungsten ring with high quality polished tungsten carbide ring

Coolman is one of leading manufacturers of stainless steel and titanium jewelry.Founded in 2008 by Bill Dong and Snowy Cai.  Coolman has a professional team working hard for research and development, engineering,marketing,after-sales services.It also has first-class facilities for punching,CNC,polishing,diamonds setting and a perfect quality management system. It mainly provides OEM/ODM manufacturing services for tungsten,steel,titanium,ceramic jewelry. We has developed USA branch and own brand Gentleman, which starts with e-commerce marketing,building up a network system including the general agency,channels and distribution.Set up counters in large shopping malls.

Why choose Tungsten Carbide Jewelry?

Tungsten ring are the most wear-resistant rings available on the planet. 

Tungsten is about 10 times harder than 18K Gold. Tungsten measures

 between 8 and 9 on the Mohs hardness scale. (Diamonds are a 10 - 

the highest.) Tungsten rings will NOT bend. It has been referred to as

 "Permanently Polished Rings"