The Oka Coaster comes with six pieces of Anthracite coloured silicone mats, which bring a stylish element to the otherwise classic and simple coaster, making the Oka Coaster both practical and beautiful.The coaster is made of brass plated metal, and the mat is made of printed silicone.For cleaning it is recommended to wipe with a wet cloth. Dimensions: 4" x .5" Material: 100% Metal, Brass Plated & 100% Silicone