AGR653-30 – 30″ Corner Button-Lock Brush

30″ Corner Button-Lock Brush. Use this dual bristled brush with the AGR6XX series brush system to clean rectangular steel duct work. The shorter stiff bristles scrub hard on the interior positions of the rectangular duct while the longer soft bristles reach into the corners. Using this brush in both CW & CCW rotation allows for both sides of a corner to be cleaned adequetly. AGR6XX series brush cores can be refilled with new bristles as they wear, to reduce the cost of on-going operation. With the use an optional adaptor(AGR695), AGR6XX brush head can be used with nylon and fiberglass extension rods. This brush should be used with a Heavy-Duty Cable ONLY, AGR613-AGR615.