Fantronix Cowled Wall Outlet with a 100mm Round Spigot. This vent cover is designed to disguise unsightly ventilation openings, seamlessly integrating with your building's exterior aesthetic. The overall dimensions are 155mm (H) x 155mm (W) x 15mm (D) with a rear spigot measuring 100mm (4 inch) in diameter. It features an easy-to-install design with a detachable core and pre-drilled mounting holes for convenience. The non-return valve blocks debris, insects, and small animals from entering the ventilation system, contributing to noise reduction from both the ventilation system and outdoor environment. Constructed from temperature and UV-resistant anti-static plastic, it maintains its white colour without discoloration and meets the standards set by Part F Building Regulations. Manufacturer: Fantronix.