Three"s a crowd - a crowd that will attack scum in your aquarium when you have the Marina Brush Kit - Set of 3 on your team. Each member of this trio feature different talents to ensure your tubing is clean as a whistle. The foxtail brush is your go-to for cleaning tubing up to 1-inch in diameter and 18-inches in length. The airline brush flies through your airline tubing, while the filter stem brush is ideal for those external filter tubes and clip-on intake systems. About Marina Dedicated to providing a wide variety of friendly and affordable aquarium products for all types of fish keeping, Marina’s extensive product line has something for every fish hobbyist. Newbies love the ease and convenience of Marina’s fish starter kits, and those with experience appreciate the reliable efficiency of their filters and heaters. A varied selection of colorful, creative decorations such as gravel, plants, and ornaments, provide a gorgeous underwater environment. A vast array of maintenance and breeding accessories are practical, reliable, and timesaving so you can spend more time enjoying your aquarium and less time cleaning it. * Air-stem brush is designed for cleaning airline tubing * Foxtail brush is ideal for cleaning tube up to 18 in. long * Filter stem brush is great for cleaning external filter tubes * Set of 3 brushes to ensure clean tubing * Dimensions: 2L x 3.8W x 21.5H inches