This highly sought after koa wood inlay tungsten ring comes from our wood inlay rings line is made of ultra hard tungsten and rare exotic koa wood. This ultra-durable tungsten ring contains no titanium alloy. This design brings together the most scratch resistant material and one of the rarest woods on earth; Hawaiian koa wood. The inlay is made of 100% authentic Hawaiian koa wood, which cannot be cut down under Hawaiian law. Only trees that have fallen on their own can be harvested, which makes koa wood one of the most expensive woods in the world. This comfort-fit band has beveled edges and comes in 6 mm, 8 mm, and 10 mm wide, for couples who prefer a matching set. This is the perfect wedding band to represent your love and commitment. Note, inlay is protected by a resin that can be scratched. Truly Free Lifetime Sizing and Lifetime Warranty on all tungsten rings, no exchange|sizing fees.