This Hydronix SPC-45-2050 SPC Series cartridge, available here in a 6-pack, is bacteria and chemical resistant. Made from a durable polyester for a high quality pleated water filter that is washable and reusable. This polyester pleated cartridge provides great dirt-holding capacity to extend the time between cartridge changes. Can be used in residential, commercial and industrial applications. The polyester media of the SPC-45-2050 SPC Series cartridge is pleated around a polypropylene core for added strength. The ends of the cartridge are immersed into a thermosetting vinyl plastisol. This plastisol fuses the three components together for a durable, unified end cap and gasket. Order today!