For removal of beer stone and scale. Directions: use at rate of 1 oz. Per gallon of water. Allow contact time of 10 min. Drain and allow the surface to air dry. Rinse and sanitize just prior to next use. For stubborn scale or stone follow standard instructions but do not dilute. Apply full strength to area. Five Star beer stone remover-8 oz., country of origin - United States, manufacturer name - Five Star.