General description These 6 Pack Round Rock Drink Coasters are made from 100% premium black slate, providing a stylish and functional solution for protecting your surfaces. The coasters are non-toxic and odorless, featuring slightly rough edges that enhance their aesthetic appeal. Technical specifications Diameter: 4 inches (approximately 10 cm) Material: Slate stone Color: Black Package Contents: 6 x Coasters Measurement allowed error: +/- 1-3 cm Compatibility and accessories Suitable for all standard cups, mugs, glasses, and containers Installation No installation required; simply place the coasters on your desired surface. Usage Ideal for protecting countertops and desks from stains. Can also be used for engraving, painting, drawing, DIY projects, and crafts. Easy to clean by rinsing with water and wiping with a cloth; for stubborn stains, soak and use detergent or baking soda. Other information Note: Light reflection and different displays may cause the color of the item to differ