Pentair Pentek CW-50 Sediment Water Filter, 10-Inch, Under Sink Polypropylene String-Wound Filter Cartridge, 10" x 2.5", 50 Micron. Keep your water clean and protect your appliances by removing dirt, sand, silt and particulates. It fits all 10" housing and can replace any 10" x 2.5" sediment filter. Economical solution to reduce fine sediment, including sand, silt, rust and scale particulates. Durable polypropylene cord wound around a rigid polypropylene core in a standard pattern. Suitable for wide range of sediment filtration applications, including municipal and well water as well as many industrial fluids.