This replacement filter cartridge comes with a technical specification Filbur# FC-1961, Pleatco # No, Unicel # C-6960 and OEM # 178654. This product is a high performance filter cartridge can handle a top load of 15 sq. ft. This state of the art 15 SQ FT. Quad DE 60 filter is of superior quality as per industry standards. This filter comes with 3" open hole at the top and at the bottom. It is 20 3/4" long and 6 1/4" wide. It efficiently provides you dust, sand and worm free clean and clear water solution for your pools and spas. The best in the industry this product matches all your water purifying needs and offers quality with cleanliness and hygiene par excellence.