Custom Jewelry 9mm Gold Tungsten Carbide USMC Marine Anchor Globe Eagle Rings (full and half sizes 5-15) Always Free First-Class Shipping All our tungsten rings are Cobalt Free and stamped Tungsten Carbide on the inside of the ring All our Tungsten Rings are Comfort Fit Available In Full and Half Sizes 5-15 Lifetime Warranty - We've Been Selling Tungsten Rings for Nearly a Decade