The Stud Damper is the inexpensive quadrant damper with an average savings of $8 to $15 per damper. It is a manual balancing quadrant damper designed for quick installation while requiring No FABRICATION, MEASURING, SCREWS OR SEALANT. It is designed with a 1 ¾” standoff and ½” shaft for commercial applications. The Stud Dampers patented compression fit design completely seals the duct, allowing no external duct leakage. Specifications are available on our website for submittal data.