This clear pepper grinder is made from ABS Shell, AS Transparent Window, and Ceramic Grinder Core. The transparent bottle helps you easily identify sea salt and pepper. The size of this product is 5.2*14CM, which is very convenient to carry. This salt and pepper mill has a knob on top to set the roughness of your desired seasoning.When you're done with it, put a plastic lid on the top, which will keep your desk clean.