Master Flow 16 in. x 8 in. Die-Cast Aluminum Grate Style Foundation Vent in Mill

The Master Flow 500 grate style foundation vent allows air circulation to reduce moisture and helps prevent decay in your foundation with a net free vent area of 28 sq. in. The vent is die-cast aluminum and features positive open/close damper action and lintel for foundation block construction. The damper adjusts manually.