40 Inch Polypropylene Pleated Filter Cartidge(Outer Dia 2.5 mm): Polypropylene filter cartridges are used in critical filtration Applications within food, pharmaceuticals, biotech, dairy, beverages, Brewing, semiconductor, water treatment and other process IndustriesPolypropylene pleated cartridges use the very latest gradient density micro fiber media technology to provide a combination of excellent micron ratings, high flow rates and high contaminant holding capacities.Polypropylene offers an extremely broad chemical compatibility making it suitable for Many applications.