Pool Filter Replaces Unicel C-9403, Pleatco PWW150 ZEL, Filbur FC-2969 Filter Cartridge for Swimming Pool and Spa Media Area 150 sq ft, 9 15/16" OD, Open Hole: 5 13/16" Top, Open Hole: 6 1/16" Bottom, 25 5/16" Long, AK-80001 1 Year Warranty - Baleen Filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life 150 sq. ft. 9000 Series Cartridge for Pleatco PWW150 ZEL Filter, replacement of Unicel C-9403, Pleatco PWW150-4 Baleen Filters Top: Open Hole: 5 13/16" Bottom: Open Hole: 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.