Speedi-Products AC-VDQ 04 4-Inch Diameter Galvanized Duct Volume Damper w/Quad
Speedi-Products 4-Inch Galvanized Sheet Metal Round volume damper with manual quadrant adjustment handle. Ideal for use in branch duct lines for adjusting supply or return air volume. Field installed into sheet metal starting collars or register boots. Can be used for Remodeling, Do it yourself and New Residential projects.