Length: 3-3/4"Diameter: 4-1/4"Top opening: 2-1/16"Bottom opening: 2-1/16"   Replaces popular brand part numbers: Unicel C-4313 Pleatco PBW4Pair Filbur FC-3753 Features: 6 sq. ft. ea. of high-quality Filtration Fabric Exclusive Expansive Flow™ cores Alternative filter names: Size 1, Simple Set Type 1, Type D, WM-3779, 090-050140, 11692, Used in pools/spas made by: Aqua Leisure, Best Way Accessories, Bestway, Intex Pools, Krystal Clear, Simple Set, Walmart and other manufacturers   By Guardian Filtration Products • 404-120