Oase's spiral brush easily and thoroughly cleans the inside of your aquarium airline or hose tubing. The flexible brush is made of a fine stainless steel type coil that enables you to clean hard to reach spaces. Suitable for cleaning hoses with an internal diameter of 9mm – 25mm, the 150cm long brush can be used in both saltwater and freshwater aquariums. Cleaning your hose on a regular basis will ensure the filtration system is kept at its best and will prevent blockages and algae build up.