Thorsten Rings WARWICK Matte Brushed Finish Center Tungsten Carbide Wedding Ring with Alternating Polished Grooves Comfort Fit Lightweight Durable Wedding Band - 8mm Hypoallergenic, Durable and Heat Resistant Black Ceramic Comfort Fit Great For Both Men & Women Great Wedding Ring or Promise Ring Free Shipping, Free Lifetime Warranty, Free Lifetime Sizing Beautiful Workmanship on Brushed Finish and Alternating Grooves