The two-piece, snap-together design covers all screw heads and offers a clean updated look. The base section and screw-hole placement is identical to the #3840 and no alterations are necessary to exchange the two parts.
The Rotaire line offers the ideal properties for increased efficiency in all heating and air conditioning applications: 360 rotation, easy installation and long term durability. The Rotaire Grille has an over-all diameter of 5-1/2" and is designed for accepting all types of 4" Flex Duct.
D&W White 4" Round Register Additional Information
Over-all diameter of 5-1/2"
Designed for accepting all types of 4" Flex Duct.