Inspired by the stunning natural colours of gemstones, a unique collection of incense burners professionally crafted from American Ash Trees with its typical straight and smooth grain.The smart design is made to allow ventilation across the burner to keep it cool.Instructions:- Use 33mm or 40mm charcoal size (OUDCRÀFT Burning Kit is recommended)- Use Silica Grains Easy to use and maintain, Topaz is the perfect tool for long-lasting fragrance. If you're looking for an incense burner that looks as beautiful as it performs, you'll want to add Topaz to your collection.