Description: 【With Locking Keys】: Lockable, with 2 keys to ensure water safe, and prevent others from opening the filling port. 【Premium and Reliable】: Gravity Feed Water Fill Hatch Inlet is made of ABS material, which is strong, toughness, and not easy to crack. 【Waterproof Groove】: The hatch is deepened with waterproof grooves for quick drainage, preventing rainwater or car wash water from easily flowing into the water filling position. 【Easy Installation】: Comes with Mounting Screws, Easy to install. 【Application】: RV Water Locking Cap with Inlet Gravity Water Filling Hatch is suitable for RV, Trucks, Trailer, Caravans, and Cars. Specification: Material: ABS 16.6cmx15cmx9.4cm/6.54inchx5.91inchx3.70inch Size Chart: Opening size: 10.6cmx12.1cm/4.17inchx4.76inch Water adding diameter: 2.5cm/0.98inch Screw hole distance: 8cmx8.4cm/3.15inchx3.31inch Protruding body: 1.1cm/0.43inch Package Includes: 1 Gravity Water Inlet Hatch With 2 Keys and Mounting Screws   Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!