Length: 8-15/16" Diameter: 17-3/8" Top opening: 4" Bottom opening: 4" Built to meet OEM specifications, the Guardian 817-145 features: 75 sq. ft. of high-quality Filtration Fabric Exclusive Expansive Flow™ core Break-resistant Guardian banding Replaces popular brand part numbers: Unicel C-8411 Filbur FC- 1255 Pleatco PWWCT75 Alternative filter names: 817-0075N, 817-0075P, Clear Water II 75, Pro Clean 75, 17-175-2130, PCCF-075, 090164861005, SD-00725, SD-00727, SD-01276, 090164999845, 090164861036, SD-00726, SD-00719, PWWCT75-4, PWWPC75, PWWPC75-4, PWWPC75-M   Used in pools/spas made by: Hayward, Leisure Bay Spas, Waterway Plastics & other manufacturers   By Guardian Filtration Products • 817-145