Constructed from high impact polypropylene and designed for easy maintenance, Opal XL cartridge filters house an extra-large filter cartridge to maximise its dirt holding capacity and minimise filter maintenance, leading to significant water savings.Features- Screw down lid requires no clamps or tools for simple cartridge removal or replacement. - 2- / 63mm inlet and outlet ports for maximum flow and minimum back pressure.- Heavy duty extra-large pleated filter cartridge