CHEW PROOF MATERIAL: Made of high quality PET plastic and stainless steel ball-point tube nozzle. Suitable for middle and small sized pet, like puppy, kitten and rabbit; Not suitable for very small pets like hamster or guinea pigs. LEAK PROOF DESIGN: Spring-loaded ball-point tube o-ring rubber on the cap and nozzle prevent leakage and avoid pollution of water. IF THE BOTTLE LEAK, IT MIGHT BE SOME AIR IN THE TUBE. PLEASE FLICK THE BALL-POINT TUBE TO RELEASE THE AIR. ADJUSTABLE: The bottle mounts with 4 different grooves for greater height adjustment ability for the hang-on bracket and the screw-on bracket. USAGE INSTRUCTION: Insert the drinking tube through the wire cage side or crate door. Hang the bracket over the appropriate cross wire. Add the screw-on bracket by checking position of the bracket's snap-fit attachment, and tighten the screw fitting from inside the cage. Refill water by opening the top cap. PRODUCT DEMENSION: Length: 5.8'; Tube length: 2.2'; Nozzle diameter: 0.6'; Capacity: 12oz (350ml). Please allow 0.4'~1.2' measurement error. The actual color may vary slightly from the online image due to monitor color settings.