HSG Men Wedding Bands Tungsten Ring Plated Blue Line Notch 8mm Polished Genuine Tungsten,13 kinds of sizes available. 8mm Comfort Fit Polishing comfort fit on the inside of the ring makes more comfortable to wear.The inner surface is polished,you will not touch nickel ingredients,so that the rings are hypoallergenic. The density of tungsten is 8-9M,it is just lower than diamond. (Diamond is 10 - the highest). Its density, similar to that of gold, allows tungsten to be used in jewelry as an alternative to gold or platinum. its density is 10 times of 18K gold, 4 times of titanium,5 times of stainless steel. 30 Days Money Back or Exchange Guarantee.We checked all the items carefully before the delivery,if you have any problem,please feel free to contact us.