Introducing the Mako Boat AC Vent Cover, crafted from durable brown plastic. Measuring approximately 3 7/8 inches in diameter, it's designed to fit Mako boats. The vent cover has an outer diameter of about 5 3/4 inches and a depth of 3 1/4 inches. It requires a 3 7/8-inch diameter cutout for installation and mounts easily with (2) 1/8-inch holes spaced 5 inches center to center.