The purpose-built Vents KOM 200 U Spring-Loaded Backdraft Damper is designed for use in 8" round duct systems, providing effective protection against backdrafts, as well as keeping out insects and birds when your ventilation system is not in operation.Installation of this damper is hassle-free, thanks to its user-friendly features. It boasts a robust 24-gauge galvanized steel housing, precision-engineered aluminum blades with a spring-action mechanism, and noise-reducing foamed rubber seals to ensure a tight and efficient seal Perfect Solution for Bathrooms, Cottages, Kitchens, Apartments and Tiny Homes.What makes a Vents Backdraft damper special? Read our Blog here. Need larger quantities?We work with contractors, developers, and builders across North America. Call us toll-free or email our sales team - we’ll get you great pricing for your project. Features: 24 gauge Galvanized Steel construction Compatible with a 8" duct Spring Loaded Damper Rubber Seal