A. 2 Pieces Spa Filter Cartridge, For Pleatco Pww50 Hot Tub Filterspa Filter For Unicel 6ch-940/jacuzzi Spa Business Whirlpool Replacement Filter B. Swimming Pool Filter: Polyester Fiber Material, Good Dust Collecting Ability, Replacement Filter For Swimming Pool And Spa Cleaning System C. Product Size: Swimming Pool Filter Diameter: 150Mm / 5.9In ; Height: 241Mm / 9.5In; Thread: 46.5Mm / 1.8Inch D. Product Features: Swimming Pool Filter Collapsible Design Increases The Filter Area, Small Pressure Difference, Large Flow Rate, Long Use Time, Can Be Cleaned And Saves Costs. E. Product Compatibility: The Pool Filter Is Compatible With Most Indoor And Outdoor And Above Ground Pools, Indoor And Outdoor Hot Tubs And Hot Tubs. F. Perfect Job: The Filters Of Pool Are Essential To Keep Lay-Z-Spa In Top Working Order. Simply Connect It To Your Spa And It Will Filter Dirt And Grime From The Water To Keep It Clean And Healthy.