Features: Premium UV resistant ABS plastic roof vent cover effectively prevents sewer gas odors from entering your vehicle while ensuring long lasting durability in harsh weather conditions. Features pre drilled screw holes for secure installation and a cap design, fit 1in to 2 3/8in diameter pipes for silicone sealed performances. Ideal for owners, campervan enthusiasts, and outdoor adventurers seeking ventilation solution for their mobile living spaces. Maintains airflows during extended road trips, campground stays, or when parked in direct sunlight, protecting interiors from methane buildup and unpleasant smells. Engineered as a direct replacement for worn accessories, this black vent cover combines ABS construction with streamlined functionality for maintenance. Specifications: Component: ABS Size: about. 132x132x73mm/5.19x5.19x2.87in Package Includes: 2 Set Campers Sewer Roof Top Cover note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.