Features. Finish - Gray.. Material - Stainless SteelThermoplasticAluminum Mesh.. With 1W frame for new construction or to replace old foundation vents.. Fits standard 8 x 16 in. concrete block opening.. Operates automatically without electricity; opens at 70 degrees Fahrenheit closes at 40.. Simple homeownerDIYer snap-in installation with color matched set screws for additional stability.. Removable back for maintenance and cleaning.. Screened with 18 in. heavy-duty aluminum mesh.. High-density thermo-plastic construction.. All metal parts are corrosion resistant stainless steel.. Aluminum louvers.. No mortar required for installation.. 62 sq. in. net free area.. Dimension - 17.67 x 9.87 x 5.02 in.. Item Weight - 2.9.