High quality materials:Our coasters are made from high quality slate. Strong and durable, they are unbreakable, odourless and reusable. The edges are finished with a raw edge and hand crafted to add to the aesthetic. Anti-slip design:The black slate coaster has four non-slip feet on the bottom to prevent your furniture surface from being scratched. slate coaster provides you with good stability so that your cup doesn't wobble. DIY Coaster:Our slate coasters are available in your own DIY design. You can decorate the coasters by laser engraving, painting,drawing and more. Slate coasters can be used as a unique coaster for your friends and family. The perfect gift for weddings, birthdays, Valentine's Day, Christmas and New Year. Easy to clean:These coaster sets are very easy to clean in everyday life, simply rinse the coasters with water and wipe clean with a clean rag. The perfect size:The 4x4 inch fits most cups, glasses, mugs, goblets, whisky glasses, coffee cups, jugs, plates and more. These black slate coasters will help to keep your table free from grease, water and other stains. A convenient experience for you in your life. Colour:black Material:natural rock slab Size:10 x 10cm Package Contents: 12 x Stone coaster 1 x storage bracket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.