Aqua Kleen AK-90302 Unicel Replacement Filter Cartridge for Swimming Pool and Spa 90 sq. ft., 8" OD, semi circular handle Top, Open Hole: 2" Bottom, 15 1/2" Long, AK-90302 Exact Fit for Unicel: 8CH-102 Exact Fit for Pleatco: PSD95 Exact Fit for Filbur: FC-2781 Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures