Kaytee Small Animal Chew Proof Water Bottle Holder, 16-Ounce Chew proof water bottle holder 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 Totally adjustable hanger features a secure spring holder Measures 8-3/5-length by 1-4/5-inch width