Baleen Filters 100 sq. ft. Pool Filter Replaces Unicel C-8311, Pleatco PXST100, Filbur FC-1285-Pool and Spa Filter Cartridges Model: AK-70014 Media Area 100 sq ft, 8 15/16" OD, Open Hole: 4" Top, Open Hole: 4" Bottom, 17 3/8" Long, AK-70014 Baleen filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life 100 sq. ft. 8000 Series Cartridge for Hayward XStream CC-1000 Filter, replacement of Unicel C-8311, Pleatco PXST100 Baleen Filters Top: Open Hole: 4" Bottom: Open Hole:4" Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands high Pressures & Temperatures