Beckson Marine’s 3-inch C-7 Hard Clamshell Vents provide ample airflow to an engine compartment, locker, cuddy or cabin. The vents are available in white but can be painted to match a boat. Made in the U.S. of durable molded plastic, they’re UV-resistant for a long life. The vents can snap onto a deck-mounted base that has an included hose adapter, and accepts a 3-inch VT-3 hose. The vents install easily on vertical and horizontal surfaces.