Ethanol Molecular Structure Coaster Set - Chalkboard Image - 4 Piece Set - Neoprene - Neurons Not Included Set of 4 individual - 4 inch x 4 inch square, neoprene coasters Printed in USA in our Neurons Not Included studio Permanent matte finish - safe to spot clean with mild detergent Free Shipping Non-slip recycled rubber back helps protect furniture