Tough, Yet Flexible Get into those hard-to-reach places with Zen® Pipe Cleaners! Our pipe cleaners are tough yet flexible, with tiny bristles that help scrub away tough resin from hard-to-reach places. Zen Pipe Cleaners - Bristled 44/bundle Tough, Yet Flexible Get into those hard-to-reach places with Zen® Pipe Cleaners! Our pipe cleaners are tough yet flexible, with tiny bristles that help scrub away tough resin from hard-to-reach places. Extra Absorbent The Zen® Pipe Cleaners are extra absorbent to wipe up sticky residues. 6 inches (15 cm) long Each pipe cleaner is approximately 6 inches (15 centimeters) long, and comes in a 44-count bundle.