Material - Crafted from high-quality plastic material, these RV Roof Covers are UV- and built for long-lasting use, ensuring durability in weather conditions. Perfect Dimensions - With dimensions of ID 3.8Inch, a 5.3Inch diameter base, and standing 3Inch tall, these vent caps are an ideal fit for pipes ranging from 1Inch to 2-3/8Inch in diameter, ensuring a perfect and secure match. Effective Odor Prevention - The roof vent is designed to expel sewer gas, preventing unpleasant odors from entering your RV through the plumbing. It securely mounts on top of your RV's ventilation pipe for efficient odor control. Simple Installation - Featuring six screw holes in the base for easy mounting, these covers can be quickly installed by screwing them on. Be sure to use silicone caulking to seal all around for added protection. The cap effortlessly snaps onto the vent, streamlining the installation process. Comprehensive Package - Each package includes 2 RV Plumbing Vent Caps, complete and 12 screws. These caps are perfect replacements for worn-out vents, offering a hassle-free solution to maintain the integrity of your RV plumbing system. Colour:Black Material:Plastic Package Contents: 2 * RV Roof Vent Cover 12 * screws Only the above package content, other products are not included. Note: Light reflection 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.