Check the listing for details. Watts 10" x 4.5" String Wound Filter - 50 Micron for Whole House FIlter Big Blue. Condition: New. Listed at 22.99 USD. Watts 10" x 4.5" String Wound Filter - 50 Micron The Watts 10" String Wound Filter is a 50 micron water filter cartridge made of FDA grade polypropylene fibers that will reduce sediment, sand, dirt, rust, and other impurities in your water. This Watts Full Flow string wound water filter (SF50-10-425) offers excellent chemical compatibility and high dirt filtering capacity. This string wound filter is made of FDA grade polypropylene and is suitable for potable water as well as industrial use. Watts filter cartridges are compatible replacement filters for Pentek Big Blue filters as well as Culligan filters. T Max Temp.: 140 F50 Micron RatingDimensions: 9.75"L x 4.50"DReduces: Sediment, Sand, Dirt, Rust, Etc.Media: FDA Grade Wound Polypropylene (PP) FibersFilter life depends on water quality and usage. This Watts filter should be changed when a decrease in water pressure is noticed. Fits any 10" housing http://www.ebay.com/itm/174263256377