Factory replacement cartridge filter element for all 1990-2009 Hot Spring, all 1998-2002 Hot Spot spas and all HotSpring Solana models. This is a standard fiber filter. If you are looking for a filter made out of ceramic, you are looking for the HotSpring Tri-X filter, part number 73178. For 1998-2002 HotSpring Hot Spots RE, RLX, SE, SLX and SLXtra see item #71825.
