Choco Nose H570 Patented No Drip Large-sized Dog Water Nozzle, Recommended for Medium to Large -Sized Dogs, Enlarged Sized Leak-proof Nozzle, BPA Free, Nozzle Diameter: 22mm Enlarged nozzle (22mm) is recommended for Medium to Large-Sized Dogs Nail-on bracket: It may also be nailed to the wall or wooden furniture. Two metal balls for adjusting the water flow. Nozzle fits most regular PET / Soda bottles