Check the listing for details. Harmsco H-4335 Replacement Spa Water Filter Cartridge. Condition: New. Listed at 25.00 USD. Keep your spa water crystal clear with this top-quality replacement filter cartridge from Harmsco. Designed to fit Harmsco ® H-4335 Replacement Water Filter Cartridge - Rainbow 35 sq.ft. Replaces RA35TC / C-4335 / PRB35-IN. 9 3/16" length X 5" diameter, this pleated filter cartridge is an essential component for any spa owner. Its unique design ensures maximum filtration, removing dirt, debris, and other impurities from your spa water. Constructed from high-quality materials, this filter cartridge is built to last. Its durable construction means that it can withstand the high pressures and temperatures of spa water, ensuring that you get the most out of your investment. So why wait? Upgrade your spa filtration system today with this premium replacement filter cartridge from Harmsco.