Tungsten Carbide 5/16" ( 8 mm ) Comfort Fit Domed Band w/ Zirconium Plating Tungsten Carbide 5/16" ( 8 mm ) Comfort Fit Domed Band w/ Zirconium Plating All items ship with a free beautiful blue metallic Top Jewelry Mall gift box. Just put a little bow in the corner and your gift is ready to go !!