Cepillo de drenaje flexible de doble extremo para manguera de acero inoxidableDesigned with rotating bristles pipe brush , drain snake,stainless steel materialflex two end long brushflexible tube cleaning brush makes cleaning easier Good as aquarium tube brush tank kitchen sink drain cleaner,scrub brush fish tankwire pipe brush tube cleaning brush both brushes works great at cleaning around the stopper and will reach the u bend with no problems Use a mild laundry detergent and warm water,air gap brushkeep the tube as straight