Features: 1.Wide Application: Gravity water fill inlet is an auto hatch, perfectly applicable for RV, motorhome, camper, trailer, caravan. 2.Durable Material: Made of high quality food grade PP stabilized plastic with stable performance and high reliability. 3.Faster Filling: Gravity water inlet features a 10mm/0.39in air vent for faster filling and a 40mm/1.58in connection barn. 4.Spring and sealed ring design, effectively leak proof and anti loosening, bring you more convenience. 5.Safe Installation: The premium quality gravity water fill inlet is lockable, comes with 2 pieces of keys, ensure using water safely. Specification: Item Type: Water Fill Inlet Material: PP Color: White Opening Diameter: Approx. 78mm/3in Applicable Casement Door Thickness: Approx. 30-40mm/1.18-1.58in Application: For RV Motorhome Camper Trailer Caravan PackageList: 1 x Water Fill Inlet 2 x Key 1 x Sealing Ring 4 x Fixing Screw