SPC-45-2005 Hydronix Whole House Replacement Sediment Filter CartridgeThe Hydronix SPC 45 2005 pleated sediment water filter is a durable polyester for a high quality cartridge that is washable and reusable. The SPC 45 2005 is pleated around a polypropylene core for added strength. It is a perfect pre filter for reducing sand, silt, rust and particulate scale, and is a compatible replacement cartridge for many brands of 20 inch Big Blue sediment filters.