Specifications:It is made of premium quality rubber material which makes it very safe and durable.Furthermore, it is featured with sealed ring design so it is leak-proof and anti loosening.Also, it is lockable with key which makes it is able to ensure using water safely.Meanwhile, it can be used on a variety of models such as RV and trailer.It would absolutely be a perfect accessory for your RV car.Item Name: Water InletMaterial: RubberFeatures: Easy to Install, Fine Workmanship, DurableMounting Hole Diameter: 8cm/3.15" (Approx.)Inlet Diameter: 11cm/4.33" (Approx.)External Water Pipe Diameter: 3.8cm/1.50" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Water Inlet2 x Water Inlet Keys