THE ECS VENTIDUCT SYSTEM This is one of the original ventilation systems specifically designed for marine use and is still one of the best. It is a proven reliable product; with thousands of units installed on both commercial and pleasure craft throughout the world in the last four decades. VENTAIR & VENTILITE STATIC VENTILATORS Attractive ventilator with low profile design to avoid snagging on ropes and offering safe ventilation at all times. With components made from non-corrosive materials, these vents give waterproof ventilation* and can be mounted at any angle. All units are supplied with an insect screen. *Except when submerged. High impact, virtually unbreakable. Size: 7" (17.8cm)