YHY 8mm Mens High Polished Black Tungsten Carbide Ring Wedding Band Comfort Fit Blue Edge 8mm mens Two-Tone tungsten ring black high polished domed blue plated edge Cobalt Free and Nickel Free Hypoallergenic and Scratch Resistant/Proof.Super smooth and comfort fit Comes with a FREE Ring Box. Great gift for Valentines Day/ Birthday/ Mother Day/Father Day/ Christmas/ Wedding/ Engagement/ Promise/ Anniversary Jewelry Fast shipping for Prime,Free return and exchange size,30-Day Money Back Guarantee. Upgrade Service:Although we do not have a Lifetime-Warranty Service to purchase, we promise that if the tungsten rings sold by YJHOUSE are damaged-Broken/Fade(non-human damage)---- 300 days free exchange.Thank you for giving us the great reviews.