Trimline Cartridge (Elements) Filters utilise a specially treated synthetic fabric which is pleated into a cartridge. Cartridge filters are ideal for applications where backwashing may not be practical. Constructed from high impact polypropylene and designed for easy maintenance, Trimline Cartridge Filters will give years of trouble-free service. The Trimline pleated filter cartridges are fabricated from pleated reusable polyester fabric. The media has been pleated to provide 4.6m2 to 9.3m 2 of surface area to maximise the cartridge (element) dirt holding capacity and extend the time between cleaning. Material: Polyester Fabric material, Vinyl Plastisol end caps and a Polypropylene core. Operating Temperature: 40O to 50OC Maximum Pressure Drop: 20 kPa Simple maintenance One-piece mould construction 10-year warranty (5 full + 5 pro-rata) tank warranty & 1 year on all other components)