Poolmaster 18100 18" Polypropylene Cleaning Brush. Poolmaster’s Essential Collection consists of the essential must-have products for customary pool and spa maintenance, constructed with durable materials designed to keep your pool sparkling. With a straight-body design, Poolmaster’s 18″ pool brush is a great staple for any pool or spa surface, featuring 5 rows of durable Polypropylene bristles. Works with standard pool poles.