[Material] Mortar and pestle are made of 100% granite, material is strong, thick and durable, each set has a unique color and texture [Advantage] The frosted material inside Granite-mortar has better friction than Metal-mortar, spices are not easy to slip, which can achieve faster and more labor-saving grinding [Packaging] There is enough filler in the box to transport mortar and pestle without any damage [Function] Perfect for everything from grinding pepper and crushing tender herbs to making jam and seasoning sauce and more [Clean] Just rinse the mortar and pestle thoroughly with a sponge in hot water and it will not leave any peculiar smell.Made of pure natural granite, please wash before first use to remove the granite powder on the surface