Lambro 3 In. or 4 In. Black Plastic Roof Vent Cap for Bath Exhaust Fan Furnace Duct Electronic dial speed control maintains

Electronic dial speed control maintains constant SPM under varying conditions

For Use On Soft & Hard Woods

The Alumiglass Extension Pole has a smooth fiberglass handle with a rubber hand grip for a comfortable no-slip work day

Electronic clutch automatically stops when a screw is in place

Lambro 3 In. or 4 In. Black Plastic Roof Vent Cap for Bath Exhaust Fan Furnace Duct Electronic dial speed control maintainsFor venting 3' or 4' bathroom exhaust fans. Includes 3' and 4' locking plastic flanges for 3' or 4' duct installation. Improved damper design for easier outbound airflow and no back draft from outside air. Black.