Cowl Vents are available in both low profile and standard height contours. These vents are a perfect air intake supplement to solar ventilation, and are also commonly used as a bilge ventilating system with or without a mechanical blower. Marinco was the first supplier of soft, durable PVC vents that are flexible and safe. For interchangeability, Marinco 4 cowl vent models fit into the same 4 Snap-In deck plates used by the Combo and 12v vents (3 or 4 sizes). - Soft and durable PVC construction returns to original shape if stepped on Safer than metal cowl vents - prevents injury and resists snagging lines Snap-In vents include deck plate and cover Marinco adapter accessories make installing below-deck duct hose easy -