... flow 3.Durable,adjustable 4.easy to install flow damper,ventilation dampers,louver vents damper vent dampers volume damper duct damper ... : AutoCAD, UG, CATIA, Solid works, etc Product Name flow damper,ventilation dampers,louver vents damper Item codeABSG001MaterialPlastic(ABS/HIPS) Colorthe frame ...