King Will Mens 8mm Black Tungsten Ring Wedding Band Pink Camo Hunting Camouflage High Polish Comfort Fit 9. Genuine Tungsten Carbide (Cobalt Free). Classic, Heavy and Durable. Cobalt Free and Hypoallergenic and Scratch Resistant. King Will's jewelry box, save your giftwrap service fee, and help you store the ring much safer and longer. If you have any question, please post into "Customer Questions & Answers" at the bottom of this page.