The Black Lacquered Mini Column Mill is made using rubber wood from FSC-certified sources, and finished with 8 coats of high gloss lacquer, hand polished between each coat. Using a ceramic grinding mechanism, the mill requires a clockwise motion to activate. The mills can be used for grinding either Rock Salt (Dry Salt Crystals) or Black Peppercorns. Not to be used for sea salt, wet salt, or dried wet salt or pink peppercorns. Do not leave in prolonged direct sunlight. Beautifully gift boxed. Wipe surface clean with a damp cloth. Do not immerse in water. Height including screw knob 133 mm, Base Diameter 47 mm.