The Hagen Marina flexible Cleaning Brush reaches all the places you can't. The brushs long, coil construction makes it an ideal tool for cleaning out the insides of aquarium tubing. Flexible cleaning brush for aquarium tubing Bendable handle follows tube configuration Helps keep aquarium water clean and healthy Marina Flexible Cleaning Brush Dimensions: 15.2" Long With convenient, large diameter hose cleaning, the Felxible Cleaning Brush clears out gunk and debris from aquarium filters up to .75" in diameter and 21" long.