For maximum protection against rust and corrosion, use the FMP 129-1302 Stainless Steel Flame Guard Exhaust Hood Filter. This stainless steel filter features a seamless surface that allows constant grease to run-off and flow into collection troughs and the flame barrier provides added protection against grease fires. NSF approved. Product measures at 16-inches tall by 16-inches wide by 2-inches deep. Dimensions are nominal, actual dimensions are approximately 1/2-inch less.