4" Round Cork 6-Coaster Set (Sold by Case of 4)Cork coasters are a great gift or incentive. Because cork is made from only the bark of the tree it is one of the most highly renewable resouces available and offers both beauty and durability. Topstiched all around and 1 8" thick, the inner foam absorbs moisture, allowing the surface to retain its original beauty. Laser engrave them to black for a stunning contrast. set has 6 coasters in a matching holder.