The Glasfloss GDS disposable panel filter features an innovative, reinforced, 'double strut' construction for excellent durability and performance in commercial, industrial, and residential applications. The new design provides 10% greater open media area than traditional metal grill filters and offers excellent dust holding capacity. In addition, the new design allows for easier disposal, eliminates sharp edges for safer handling and reduces carton weight for lower shipping costs. The new GDS disposable panel filter is available in 1' and 2' depths in many standard sizes.Progressively dense fiberglass to maximize dust holding capacity. The media and strut retainers are glued and sealed inside a one-piece, craft board frame made from 100% recycled materials. The filter frame is clearly marked with size, U.L. classification and air flow direction. GTA metal grill fiberglass series is available for nonstandard sizes only.The Glasfloss GDS Series of disposable panel filters can be used as a direct replacement for filters supplied in original equipment. Standard sizes are available in 1' and 2' depths to accommodate most filter tracks and return air grills.