Super PET water bottle holder - 16 oz.This is a universal fit Water bottle Bracket. Its chew-proof holder is made of high-grade steel construction with epoxy-coated finish. It slides on to any wire cage, hangs on any aquarium or attaches to wooden walls with a screw. The easy-to-use, totally adjustable hanger features a secure spring holder. This size will hold any standard 16-Ounce. Water bottle. The actual size is 8.6" Long and 1.8" Wide. A smaller version that holds 4- and 8-Ounce bottles is also available.