Round Spring Return 2 Wire Damper by Braeburn. Top Quality damper with an industry respected standard integrated motor with super wide steel gear, not plastic. Motor uses an internal spring, not a cheap add-on spring. This motor can easily be replaced with several other industry standard motors.
RetroZone's™ Slip-In Series of Retrofit Slip-In Dampers allows easy fit to sheet metal ducts that are already installed, where it would be difficult to cut out a complete length of pipe to install a traditional mechanical damper.
