Diameter: 5"Length: 20-1/8"Top opening: 2-1/8"Bottom opening: 2-1/8"   Replaces popular brand part numbers: Pleatco PRB75 Unicel C-4975 Filbur FC-2395 Features: 75 sq. ft. of high-quality filtration fabric Exclusive Expansive Flow™ core Break-resistant Guardian banding Also replaces: 17-2623,  25390,  R173435, 17-3435, R172623, 17-2632, RTL-75, Rainbow Dynamic 75, 17-175-1600, APCC7221,17501, 17-2632 RTL-75, PRB 75 Compatible with: Custom Molded Products, Dakota Spas, Emerald Spas, Hydro Pool Industries, Nahani Spas by Maax, Pentair Pool Products, Rainbow Plastics, Serenity Spas & other manufacturers   By Guardian Filtration Products • 420-210