【Compatible Models】Our Spa Hot Tub Replacement Filter is Compatible With with All RELXTIME Hot Tub, All ALEKO Hot Tub, Wejoy Hot Tub Aquaspa, Screw-in Hot Tub Filter, Compatible with Many Massage Pool Models.Note: All referenced manufacturers' names and part numbers are the trademarks of their respective owners. Mentioned for compatibility purposes only. 【Product dimensions】Outer diameter: 3.94 " (100 mm); Inner diameter: 2.36 " (60 mm); Height:2.95"( 75 mm). 【Features】 The filter element is mounted in the filter pump and absorbs dirt when passing through the system. Helps remove dirt and gives you clean and fresh water. 【Easy To use】The pool filter can effectively adsorb dirt and is easy to clean. Simply remove the filter cartridges from the pump and spray the residues with a garden hose; and the hole has thread, you can easily unscrew and replace the filter. 【Effortless Cleaning】 The Trilobal Fabric Structure of the filter facilitates easy release of impurities during cleaning, ensuring the filter feels renewed after each wash. For optimal performance, it's recommended to clean the cartridges once a month. Screw-in Hot Tub spa Filters Replacement Compatible with All Relxtime, Aleko, Wejoy, Aquaspa Hot Tubs & Other Spas