4 inch HVAC Duct Manual Volume Backdraft Damper with Adjustment Handle Viton 1/4 inch 12vdc Choice of Engine: YUCHAI

Choice of Engine: YUCHAI

Package Contents: ONE (1) 220VAC Thermal Relay 37~50A

Lock Width: 1

Size: Port Outer Diameter: 152

Two (2) Auxiliary Contacts: Normally Open and Normally Closed

4 inch HVAC Duct Manual Volume Backdraft Damper with Adjustment Handle Viton 1/4 inch 12vdc Choice of Engine: YUCHAI4 HVAC Duct Manual Volume Backdraft Damper with Adjustment Handle Designed for demanding applications where durability and smooth operation are paramount, Ace Crew's Heavy Duty Manual Vent Dampers provides exceptional performance in even the toughest environments. Durable Material: The body is made from 22 gauge galvanized steel material and the flap blade is made from silicone which provides a tight seal. Constructed with sturdy components to ensure