The Hario manual wooden coffee grinder has ceramic grinding wheels. Ceramic grinding wheels reduce heat during grinding so as not to overpower the aromas of the ground grain. They also allow a more homogeneous grinding, in order to have it more adjusted and regulated. With capacity of 40G, the elements of screw, stopper, handle, nut are made of steel. Its body and cover are made of natural wood. This coffee grinder is ideal for "filter coffee" so called "slow coffee" preparations, such as V60, Chemex, piston and many others. Small in size, precise in manual work, the Hario 40G grinder is ideal for all small kitchens.