D&W White 4" Round Register with Damper Description
Along with the best features of the Rotaire Grille, the Rotaire Register incorporates a unique worm-drive damper for increased operational efficiency. Just a quarter turn of the center knob opens or closes the vent wings smoothly. In the fully open position the vent wings are completely retracted allowing 100% unrestricted air-flow.
D&W White 4" Round Register with Damper Additional Information
Over-all diameter of 5-1/2"
Designed for accepting all types of 4" Flex Duct.