44966 -Shut-off Damper for Circular Ducts - 4"Fantech 44966 Shut off Damper for Circular Ducts 4" Fantech's 4" Motorized Shut Off Damper is an accessory for circular ducts, can be easily installed and has a tight seal. Features Length 10" Width 4" Weight 2 lbs Diameter 4" Voltage 24 Material Steel HSS1127000
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