Baleen Filters 100 sq. ft. Pool Filter Replaces Unicel C-7497, Pleatco PJAN100, Filbur FC-5180-Pool and Spa Filter Cartridges, Model: AK-6057 Media Area 100 sq ft, 7 1/4" OD, Open Hole: 3 1/16" Top, Open Hole: 3 1/16" Bottom, 29 1/2" Long, AK-6057 1 Year Warranty - Baleen Filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life 100 sq. ft. 7000 Series Cartridge for Jandy CT-100 Filter, replacement of Unicel C-7497, Pleatco PJAN100 Baleen Filters Top: Open Hole: 3 1/16" Bottom: Open Hole: 3 1/16" Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures