These is the newest line of coasters. Each of the vintage aviation coaster instrument sets are made to simulate as closely as possible a primary flight instrument. Each coaster features the actual shape of an aircraft instrument and a dial which closely represents that of a the particular flight instrument. Our coasters are made with a tough polystyrene frame and a black rubber anti-skid base. Sold in sets of 6. Dimensions: 3 3/8" x 3 3/8"