Made from superior, carefully selected materials, these are easy- and satisfying-to-use brushes for cleaning narrow and awkward parts of wheels, such as nut holes and around valves. Unlike artificial fibres, pig hair has excellent balance between liquid retention and spreading. Why choose us? 1.Lowest Price Guaranteed 2.quality guarantee 3.Fast Delivery Free shipping over $20 How to use the product: Before use, rinse dirt and soil from the wheel with water. 1. Soak head in water before use. 2. After use, rinse and dry thoroughly. If dirt remains, wash with pH-neutral detergent.