All items are marked Replacement or Equivalent and are not affiliated with the original equipment manufacture, part numbers are for cross reference only. Bluefin FR 80/20 filters are made from a premium blend of flame retardant cellulose and polyester media. This material is especially designed for back pulse operations, and offers enhanced stability and structural integrity. All cellulose blend filters are dimpled pleated. This pleat lock helps maintain pleat spacing during operation. This is an aftermarket replacement filter for dust collector models including Donaldson Torit Model Downflow II or DFT 2, AerTable (Round Access Cover), CX, Downdraft Bench 2000 and 3000, Uniwash / Polaris Intercept Dust Collectors, and many manufacturers if equipment that use the same size filter. Confirm your current dust collector dimensions before ordering. Height = 26", Outside Diameter = 13.87", Inside Diameter = 9.479", Style = Open on both ends, Gasket = .5" x .5" Molded Natural Rubber on One End, Pleat Count = 355, Pleat Depth = 2", Pleat Spacing = Pleat lock, Filtration Area = 226 Sq. Ft., Media = Fire Retardant 80/20 Cellulose Polyester Blend, Inner Cage = Galvanized expanded metal 72% open, Outer Cage = Galvanized expanded metal 72% open, End Caps = Galvanized Metal, pleat / end cap bonding = Urethane, Nominal Airflow per filter = 500 CFM, Nominal resistance - 1" w.g., Efficiency = 99% @ .5 microns, Max operating temp = 180 deg. F.