Duke Collections 8mm Tungsten Carbide Ring Black Cubic Zircon Mens Wedding Band 8mm Tungsten Carbide Ring Black Cubic Zircon Mens Wedding Band Made of Tungsten Carbide and nickel bind which provides excellent long last durability and to keep its surface looking sleek and unblemished for years to come Our tungsten carbide rings have full and half comfort fit sizes; All of our tungsten rings are cobalt free and inside the ring is designed with comfort fit Great for any special occasions like wedding band, engagement ring, anniversary, Party, birthday, valentine's, Christmas, perfect for boyfriend, husband, father, partner, or yourself. Comes with an elegant jewelry box which saves your gift wrap service fee, and help you store the ring much safer and longer and best presentation as a gift.