About This Say good-bye to pollen, dust, and bacteria from your air and duct work – our Pristene Filters are designed for use with Decor Grates’ unique filter system, which holds filters in place using a snap-on grid that’s fitted to the bottom of our rustproof, high-impact plastic damper boxes; register and grid sold separately The filters are ideal for heating and cooling systems and will not compromise air flow to your room due to the advanced micro finish design We use only High Loft material, which allows more air to pass through vs. other filters, while still trapping most of the dust and other particles that would otherwise pass through without a filter Comes in 16ftx1ft and 4ftx1ft sizes for cut-to-fit convenience; 16ft option is pre-cut to 4ft lengths Filters should be checked monthly until it is determined how often they should be replaced, as every home and heating/cooling system is different; a filter clogged with dirt will reduce airflow Overview Brand : Decor Grates Material : Polyester Product Dimensions : 48"L x 12"W x 0.13"Th Compatible Devices : Heating and cooling systems (e.g. furnaces, heat pumps, air conditioners) Item Weight : 1.76 Ounces Global Trade Identification Number : 00771308022611 UPC : 771308022611 Air Filter Construction : Pad/Roll Number of Items : 1 Manufacturer : Decor Grates