Frame: made from galvanized steel sheet gauge 24 .
Blades: made from galvanized steel sheet gauge 20.
Handle: made from casted aluminum.
Frame is constructed from galvanized steel sheet. Joints are welded and protected by aluminum spray coating.
Damper blade, which is fixed to the bearing pin, can be rotated in vertical plane from full open to full close.
Bearing pin is coupled with hand locking quadrant with open and close marking. Hand locking quadrant frame is marked to show exact position of damper.
Designed for use in heating, ventilating and air conditioning systems.