4 inch HVAC Duct Manual Volume Backdraft Damper with Adjustment Handle Viton 1/4 inch 12vdc Size: Port Outer Diameter: 152

Size: Port Outer Diameter: 152

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

Dimensions: H: 2-½” L: 3” W: 1-1/4”

Choice of Engine: YUCHAI

gas & air - Direct Acting valve

4 inch HVAC Duct Manual Volume Backdraft Damper with Adjustment Handle Viton 1/4 inch 12vdc Size: Port Outer Diameter: 1524 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