The Harmsco 24101-19 R is a compatible replacement for the following pool filter cartridges:
The Harmsco 24101-19 Comp. Spa Filter Cartridge is a spa filter replacement that measures 2 3/4" in diameter and 9 3/4" in length, and has 6 square feet of filter area. This compatible Harmsco filter also features 1 1/16" Open top & bottom styles. With this spa filter cartridge you'll be able to purify your swimming pool & spa water.