125 SQ FT REPLACEMENT FILTER CARTRIDGE FOR SUNDANCE SPAS, REPLACEMENT OF UNICEL C-8325, FILBUR FC-2790, PLEATCO PSD125U Media Area 125 sq ft, 8 7/16" OD, 18" Long, Top Cap: Closed w/ 3 step edge, Bottom Cap: Open 2 1/2" Hole, AK-70021 Baleen Filters are made from Durable and Efficient USA Made Reemay Fabric - Washable Fabric Extends Your Filter's Life Guaranteed Perfect Fit - Extremely Durable - Wash & Reuse - Most Energy Efficient - Withstands High Pressures & Temperatures