The Torpedo Brush is made of nylon and selected brush material on a twisted galvanized steel wire. They are designed for a snug fit within the tube to produce effective cleaning. Alternate bristles and openings allow sufficient room to collect dirt without sticking in the tube. The rubber bumpers help propel the brush quickly through the tube while cleaning and stops the brush at the back of the condenser protecting both brush and condenser water box. If used in tubes equipped with inserts, the bristles will flex to enter the insert then expand to effectively scrub the remainder of the tube. Brushes can be reused many times depending on conditions. The JRRB201 brush is commonly used in air conditioning equipment.
For even more cleaning action try the torpedo brush plus! Where two plastic scrapers are secured to the end of the brush, replacing the rubber bushings, for a squeaky clean tube! (4th pictured)