10mm Tungsten Carbide Men's Ring Wedding Band Jewelry (Full & Half Sizes 5-17) 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 5-17 Lifetime Warranty - We've Been Selling Tungsten Rings for a Decade