Made from durable acrylic, the London mill both honors our heritage as well as looks to the future with a classic, yet contemporary aesthetic which will prove a stylish addition to both traditional as well as modern kitchens. Easily adjust the grind from fine to coarse by turning the knob on top of the mill and they are made from premium clear acrylic with metal accents, the mills come partially filled. Clean with a microfiber cloth to keep the mills looking their best.