Master Flow 16 in. x 8 in. Plastic Resin Slider Foundation Vent in Black

The GAF Master Flow Slider style foundation vent allows air circulation to reduce moisture and helps prevent decay in your foundation crawl space. It has a net free vent area of 40 sq. in. Item requires mortar to install. The product is polypropylene, includes a screen and fits a standard 16 in. x 8 in. foundation vent opening. The slider adjusts manually to open and close.

• Allows air to circulate to reduce moisture and prevent decay
• Slider can be adjusted manually for easy opening and closing
• For brick, block, or frame construction