Oh My Mahjong TilesEach set includes a complete set of 160 tiles, making it the ideal gift for Mahjong lovers or a luxurious upgrade for your game nights. So ditch the boring tiles and add a touch of elegance. Keep your tiles dry too much exposure to moisture can cause damage. To clean, use a soft, dry cloth to gently wipe the surface. Do not submerge in water. Store flat in a cool, dry place, and avoid exposure to direct sunlight or humidity.