The Vents KOM 250 U Spring-Loaded Backdraft Damper is purpose-built for 10" round duct systems, ensuring effective protection against backdrafts, as well as keeping out insects and birds when your ventilation system is inactive. This damper offers easy installation, thanks to its user-friendly design. It features a sturdy 24-gauge galvanized steel housing, precision-engineered aluminum blades with a spring-action mechanism, and noise-reducing foamed rubber seals that guarantee an airtight 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 10" duct Spring Loaded Damper Rubber Seal Available in a single or 2 pack