20 MICRON RATING: With a nominal filtration rating of 20 microns, our quality pleated Polyester sediment filter reduces sediment from the city and well water applications 10x2.5 NOMINAL: 10" slim filter made with pleated polyester filter media QUALITY REPLACEMENT: Comparable to S1 155001-43 S1A and other 10” x 2.5” pleated polyester water filters PLEATED POLYESTER: S1 cartridges are composed of non-woven pleated polyester, which provides a higher wet-strength than traditional cellulose cartridges. The non-woven media allows for higher flow-rates, while the pleated design creates more surface area for increased retention of sediment particles while maintaining a lower pressure drop. SP-S1 10x2.5 Pleated Polyester 20 Micron Sediment Water Filter