Vetus Louvered Aluminum Air Ventilators dissipate radiated heat ventilating the engine room. Suitable for engines up to 100hp, this air vent, with its polished anodized aluminum frame and grills, uses suction to remove and vent hot air from your vessel's engine room.These ventilators are durable and keep unwanted elements out while allowing air to pass through. One vent required on starboard side and one on the port side. Specifications Type: Louvered Material: Anodized aluminum Dimensions: 28 3/4”L x 6 3/4"H x 3” radius Cutout Size: 28"L x 6”H