Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans Interior Diameter: 3/8 in

Interior Diameter: 3/8 in

reliable glass cutting experience

X-CEL Wheel Pin – changes your cutter wheel quickly using a new ball detent design…no tool needed…no lost clips

Featuring patented IsoCore shock control system to reduce shock and vibration by 2X

and the extra large striking face

Broan 639 Wall Cap for 3-1-4 x 10 Duct for Range Hoods & Bath Ventilation Fans Interior Diameter: 3/8 inOverall 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.