The SPECTRUM Spun Polypropylene Depth Filter is a high-quality, WRAS Approved particulate reduction filter, perfect for use as a pre-membrane filter for RO Systems and within multi-stage Under Sink Filter Systems. With its grooved design, the SPECTRUM Spun Poly filter features TruDepth technology which offers a higher surface area and enhanced dirt holding capacity including dust, sediment rust and other particulates. Our most popular option for sediment reduction, the Spun Poly filter is often used in domestic filter and RO systems as well as for batch processes. Also available in a range of sizes, diameters and micron ratings. Specifications Material: Polypropylene Micron: 1, 5, 10 or 20µm Use: Particulate Reduction ( Sand, Silt, Dirt and Rust) Efficiency (%): 80 Length: 20" Diameter: Regular (2.5") or Large Diameter (LD) (4.5") End-Cap: DOE - Double Open Ended Flow Rate (lpm): 30