Upgrade your crawl space ventilation with the Master Flow FVRABL Automatic Foundation Vent. Designed to automatically open and close based on temperature, this vent helps maintain optimal airflow, reduces moisture buildup, and safeguards your foundation and plumbing against mold and freezing. Crafted from durable black polyethylene, it blends seamlessly with existing foundation aesthetics and installs easily with a snap-in design. ? Features Specifications: Temperature-triggered auto operation: opens at 70?F, closes at 40?F Dimensions: 16?in?(W) 8?in?(H); overall height 19?in Durable black polyethylene construction 57?sq?in net free ventilating area Quick snap-in installation?no tools required Helps prevent foundation decay and frozen pipes Replaces manual foundation vents Ideal for homeowners and contractors looking for efficient, hands-free foundation venting. Enhance your moisture control and ventilation system with this reliable, easy-to-install solution.