Kamenstein 5186008 4 Piece Set, Natural Acacia Wood and Cork Stackable Coasters, Set of 4 ABSORBS MOISTURE: Kamenstein Coasters are designed with a cork insert to help absorb moisture and will protect against marks and rings on your coffee table, end table and dining room table NON-SLIP: The outer portion is crafted from beautiful Acacia wood and features a small lip to keep your drink secure; each coaster has felt feet to protect surfaces and to prevent sliding SET OF 4 COASTERS: This set of 4 coasters will protect surfaces from both heat and moisture and can be used in multiple rooms of your home or office MEASUREMENTS: Each coaster measures about 4-inch diameter with a 3-inch diameter cork insert RESUABLE: These coasters are Eco-friendly and reusable unlike paper or cardboard coasters; clean as needed with a damp cloth and towel dry for best results