The Purex R173579 R is a compatible replacement for the following pool filter cartridges:
The Purex R173579 Comp. Pool & Spa Filter Cartridge is a spa filter replacement featuring 75 sq. ft. of media area for contaminant reduction in swimming pool/spa water. This compatible Purex filter measures 8 7/8" in diameter x 19 1/2" in length with 4" Open top & bottom styles.