Aqua Kleen AK-6010 Unicel Replacement Filter Cartridge Swimming Pool Spa 75 sq. ft., 7" OD, injection molded knob handle Top, injection molded cone adapter Bottom, 19 5/8" Long, AK-6010 Exact Fit for Unicel: C-7406 Exact Fit for Pleatco: PBH-UM75 Exact Fit for Filbur: FC-0770 Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures