Caravan Accessories RV Modified Gravity Water Inlet with Lock Key Water Tank Inlet Hatch Trailer RV1. Designed for the gravity water inlet of the water tank of the RV water system. 2. 1/2 inch vents, draining the tank air when adding water, it can quickly fill the tank. 3. Durable with sturdy plastic. 4. Lockable, with 2 keys for safe use of water. 5. Spring and seal ring design for leak proof and anti-loose. Parameters: Colour:White Material:plastic Incision diameter: about 85 mm / 3.34 inches Size:12 x 12 x 9.2 cm Package Contents: 1 * RV Water inlet 2 * keys Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.