Replaces Unicel # C-8417, Pleatco # PWWPC175, Filbur # FC-1294 and meets OEM # CX1750RE specifications. This 28 3/16 inch long and 8 15/16 inch wide filter cartridge has 4 inch open holes both at the top as well as bottom. It is capable of handling the top load of 175 sq ft and best fit for Hayward Star-Clear Plus C1750, Waterway Plastics. It provides you clean and clear water for your spas and pools. It is made of superior quality of materials and very easy to install.