Features: Materials: The RV Plumbing Vent Caps is made of premium-quality ABS material, which is UV resistant and durable. This roof vent can exhaust sewer gas and prevent odors from entering your RV cabin through pipes. The vent is installed on the ventilation duct of the RV. Easy to install. The base has 6 screw holes for installation, tighten them to ensure that you have silicone sealant for sealing. The hat can be easily fastened to the vent. Product size: 3.8 inches, diameter 5.3 inches, height 3 inches, perfect for pipes with diameters from 1 "to 2-3/8". Specification: Color: White Material: ABS Package size: 31.5*22*2.4cm Package weight: 134g Package List: 2* RV Plumbing Vent Caps