Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans The Lift Front design fits

The Lift Front design fits comfortably to the head and fits over regular eye glasses

garage and workshop

a self-opening spring action

Its extra-large knurl and tight jaw fit make adjusting effortless

Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans The Lift Front design fitsOverall 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.