Super convenient for washing bath and shower tile and wall corners. Angled V shaped brush and mini brush reach into those hard to clean areas. Designed for easy grip and handling. Caution: Use only as intended. Do not leave near open flame or in extremely hot temperatures. Do not use on surfaces that scratch easily. Do not use excessive force when cleaning to avoid scratching surface or damaging brush. Do not use brush if it is damaged. After each use, rinse and drain well. Store in dry area. Material: brush / polypropylene, units / polypropylene. Heat-resistant to 194 degrees.