Pool Filter Replaces Unicel C-9401, Pleatco PWW75-4, Filbur FC-2960 Filter Cartridge for Swimming Pool and Spa Media Area 75 sq ft, 9 15/16" OD, Open Hole: 5-13/16" Top, Open: 6-1/16" Bottom, 13 5/16" Long, AK-8023 1 Year Warranty - Baleen Filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life 75 sq. ft. 9000 Series Cartridge for Leisure Bay MFG, Rec Warehouse, Waterway Plastics Filter, replacement of Unicel C-9401, Pleatco PWW75-4 Baleen Filters Top: Open Hole: 5-13/16" Bottom: Open: 6-1/16" Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures Pre-Filters allow for quicker water balancing with fewer chemicals. Washing a filter will extend its life &amp; clean filters use less energy. The Jet Brush makes this quick and easy. Scum Magnets prevent scum andoil from making it to the filter for fewercleanings.