Superpet the universal fit water bottle bracket. Chew proof holder is made of high grade steel construction with epoxy coated finish. Slides on to any wire cages, hangs on any aquarium or attaches to wooden walls with a screw (not included). EZ to use, totally adjustable hanger features a secure spring holder. Easy to use adjustable holder allows you to secure the bottle in the perfect location for your pet. Ideal for hamsters mice and gerbils, pet rats, unusual pets. This size will hold any standard 16-ounce water bottle. Measures 8-3/5-length by 1-4/5-inch width.