Features: 360 Rotating campers Sewer Vent Cap prevents odor backflow with Principle driven pressure suction, ensuring unidirectional airflows to block black tanks gas from entering vehicles. Constructed with 304 stainless steel or polycarbonate option for corrosions resistance, this universally fit cap features mesh, silicone seals, and compatibility with 1 2.38" pipes across campers tanks and vent systems. Ideal for campers owners, camping enthusiasts, and frequent travelers seeking odor prevention and ventilation solution for mobile living spaces. Functions flawlessly during highway drives, heavy rainfalls, or extended stationary use while connection to black tanks, sewer lines, or outdoor drainage systems. Its patented design withstands decades long outdoor exposure with easy installation – simply aligns with existing vent bases and secure using pre drilled holes with included hardware. Specifications: Component: Nylon Color: White,Black Base Diameter:126mm/4.96'' Package Includes: 1Piece Campers Sewer Vent Cover note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.