Description: Versatile Compatibility: This Wall Hole Cover vent cap is suitable for use with pipe or openings. It ensures a secure fit and effective protection Easy Installation and Weather Resistant: Outdoor Rain Protection Vent featuring a square mesh design, this vent cap is easy to install and provides good protection against rainwater intrusion, ensuring long term durability in various weather conditionsEnhanced Air Efficiency: The smooth inner wall of the vent cap reduces air resistance, allowing for more efficient exhaust flow. Its H shaped design offers a larger outlet to significantly boost ventilation capacityInnovative Water Deflection Design: Square air outlet vent cover equipped with a water deflection plate, this vent cap directs air away from the exterior wall, minimizing the risk of dirt and stains on your building's facade.Stainless Steel Construction: Central fresh air systemt exterior wall pipe cover is made from quality stainless steel, promises exceptional strength and longevity Specification: Material: Stainless steel Size Chart: Can be used with 110 mm tubes or 100 mm openings Package Includes: 1 Wall Hole Cover Fresh Air Intake Vent Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.