Felt Filter Bag, Polypropylene Material, 50 gpm Max. Flow, 25 Microns This listing is for pkg. of 20. Technical Specification Item Filter Bag Basic Material Felt Material Polypropylene Max. Flow 50 gpm Microns 25 Filter Size 1 Height 16 1/2 in Diameter 7 1/16 in Max. Temp. 200 Degrees F Finish Natural Ring Material Galvanized Carbon Steel Seam Type Sewn Collar Type Handle and Ring Area 2 ft Reduces Oil, Sediment, Solids Application Oil Removal For Use With Size 1 Bag Housings