http://www.waterfilters.net/WPX5BB97P-String-Wound-Water-Filters.html
The Pentek WPX5BB97P is a fibrillated polypropylene sediment filter constructed of fibrillated polypropylene wound on a polypropylene core. The fibrillated polypropylene should be used when pressures require minimization of extractables and/or fiber migration. These water filters reduce sediment, sand, and silt.
