Milton Brook Unglazed Mortar and Pestle, 5-Inch Diameter Dense structural base for easy grinding and crushing of herbs and spices; perfect for grinding pills and medicines in pharmaceutical industry Unglazed finish and classic beech handled pestles for ease of use; does not stain, absorb or transfer odors or tastes to the next task Made from high quality vitrified electrical porcelain; 5 Inches in Diameter Iconic kitchenware manufactured by Wade Ceramics; comes in 6 various sizes to meet various consumer needs Oven, dishwasher and freezer proof; use mild detergent for cleaning