Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans InVent fans reduce air leakage

InVent fans reduce air leakage by up to 50% compared to competitive models

Mortise & tenon thickness: 1/4 to 1/2 in

It features a fixed front and a ratcheting-type headgear for superior protection against UV/IR rays with its heat treated #10 shade lens

Holds like a pen- compact engraver has ergonomic tri-lobal grip and precise fingertip control

Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans InVent fans reduce air leakageOverall sizing is 12 3 4 wide x 5 5 8 high. Duct fitting protrudes 4 7 8 from back of cap to allow proper fit to the ductwork (NOT for use with dryer venting). Equipped with a spring loaded backdraft damper and bird screen to keep nests and small animals on the outside. Wall cap is made of 24 gauge CRCQ steel construction with a black electrically bonded epoxy finish for durability and long life.