30% ASHRAE PANEL FILTER 600 MM L X 600 MM W X 51 MM D (23.63 " L X 23.63" W X 2.00" D)
30% ASHRAE Prefilter Panel Filter, 600 mm length X 600 mm width X 51 mm deep (23.63-inch length X 23.63-inch width X 2.00-inches deep), Air-O-J Pre-Filter, Auto-Lok and other brands of panel collectors
