JR Products Slide-out Gravity Water Fill. Combo hose connections for 1-1/4 inch and 1-3/8 inch. O-ring protected to reduce spills or siphoning. Tank vent for easier filling. Can be secured with a small padlock. Dimensions: Cutout: 2-1/2 inch dia. Outside: 3-1/2 inches x 3-/12 inches Spout Depth: 3-5/8 inches. Polar White.