Attributes . These are dual surface wall and vehicle brushes. They feature soft, unflagged nylon bristles for gentle, effective cleaning of vehicle and wall surfaces and have a dual surface plastic foam block to help keep surface contact at almost every angle. The five-hole fountain-style foam block evenly distributes water across the face of the brush and the Flo Thru design delivers constant water for superior cleaning. The block length is 10 inches and the bristle trim length is 2 3.8 inches. These brushes use a threaded end pole connection. They are ideal for car washes or car dealerships, for facility maintenance, and more. . Names