This Hydronix Series cartridge is bacteria and chemical resistant. The Hydronix Polyester Pleated Filter is made from a durable polyester for a high quality pleated water filter that is washable and reusable. The Hydronix Polyester pleated cartridge provides great dirt-holding capacity to extend the time between cartridge changes. The Replacement Water filter can be used in residential commercial and industrial applications. The polyester media of the SPC Series cartridge is pleated around a polypropylene core for added strength. The ends of the Hydronix Pleated Polyester Water Filters are immersed into a thermosetting vinyl plastisol. This plastisol fuses the three components together for a durable unified end cap and gasket. Specification . Media - Non-Woven Pleated Polyester. Materials of Construction - Core - Polypropylene End Caps - Vinyl Plastisol. Micron Rating Nominal - 1. Operating Temperature F - 40 - 125. Operating Temperature C - 4.4 - 51.7. Flow Rate gpm - 20. Flow Rate lpm - 76. Color - White. Size - 20 in. L