Master Flow 7 in. x 7 in. Butterfly Damper

Rid your range hood or microwave of undesirable air via this Master Flow 7 in. x 7 in. Butterfly Damper that installs on a round exhaust duct with a 7 in. diameter. Rust-resistant aluminum blades ensure long-lasting protection against corrosion, and a 400-degree Fahrenheit maximum operating temperature ensures reliability in high-heat conditions.

• Durable steel body with aluminum blades resists heat up to 400F
• Split-sided gravity damper maintains the air circulation
• Fits on to 7 in. diameter ducts