... to install flow damper,ventilation dampers,louver vents damper vent dampers volume damper duct damper Shaping Mode: plastic injection Mould ... : AutoCAD, UG, CATIA, Solid works, etc Product Name flow damper,ventilation dampers,louver vents damper Item codeABSG001MaterialPlastic(ABS/HIPS ... the air volume.4. Removable core, four direction air flow , the windows are assembled with each frame, the windows ...