4 Ct. set in Acetate Box - Heritage Hardboard/Cork Backed Coasters - 4 ct Set. European style coasters, produced using the finest sustainable raw materials available to maintain its original look for years. Your image is printed, fused to a rigid hardboard substrate & finished with a soft cork backing to protect furniture from scratches & spills. They are also stemware friendly. Won't scratch fine crystal! Great for elegant corporate gifts/giveaways.