The Marina Brush Cleaning Kit is equipped with three cleaning brushes, all ideal for keeping your fish's aquarium clean and clear. The foxtail brush is ideal for cleaning tubes up to 1-inch in diameter, and 18-inch in length. The air-stem brush is specifically designed for cleaning airline tubing, while the filter stem brush is great for cleaning external filter tubes, as well as clip-on filter intake stems. The brushes included in the Marina Brush Cleaning Kit are durable and perfect for reaching those hard to get places in your aquariums tubing.