Pleated Cellulous Cartridge: Crystal Quest® Pleated Cellulose Sediment Cartridges are manufactured from pleated cellulose media and are designed for general water filtration. The media is pleated around a polypropylene core for added strengeth and the ends are immersed in a thermo-setting vinyl plastisol. It’s pleated design maximizes dirt-holding capacity. 5 Microns. Construction Materials Fiber Media: Polypropylene Fibers End Caps: Vinyl Plastisol Netting: Polyethylene Temperature Rating: 40°F to 145°F (4.4°C to 62.8°C) CQE-RC-04015 18-24 Month Capacity. The rest are 12-18 Months. *Capacity is an estimate only and is dependent on influent water contaminants and filter usage.