Beech wood mills with strong mat black varnish. Strong ceramic grinding mechanism. Easy and functional 5 step adjustment of grain size. Cleaning: Wipe off with a damp cloth. To re-fill the grinder: Screw off the S/P knob at top and lift off the lid. Classic looking and very functional salt & pepper grinders The ceramic grinder is 4 times harder than steel and offers very efficient grinding for many years. 18 cm is supplied as a set. 22 and 32 cm mills are sold as singles (including an extra knob SCANPAN Design).