Wheel Woolie Three Piece Brush A Set WW3A 8", 12" and 18" Automotive Wheel Cleaning Brushes The kit contains three brushes, Large (18" OAL, 3" dia. head), Medium (12" OAL, 2" dia) and Small (8" OAL, 1" dia.). The soft, dense carpet fibers will hold suds and transfer them to the wheel. These brushes are made entirely of polypropylene and will stand up to any cleaner you choose to use. Since they are 100% polypropylene, they are recyclable. Made in the USA.