The Frank Lloyd Wright Metal Whirling Arrow Coaster Set is made of absorbent sandstone with an anti-tarnish metal design etched into the stone. The Whirling Arrow design on the four coasters is an adaptation of the sculpture at the Taliesin West Entrance in Scottsdale, Arizona. The coasters are about 4 inches square and have a cork backing to protect furniture. They are gift-boxed and ready to give to the collector of Wright.