【MADE IN USA】Quality Materials and Construction 【Perfect Fit】Fits the following models Replaces the following models:Compatible with Hayward Easy Clear C550 Hayward CX 550 Pleatco PA55 Unicel C-7455 Pure N Clean PC-1245 Filbur FC-1245 Filter Replacement Cartridge. All manufacturers' names and part numbers are the property of their respective companies and are used solely for reference compatibility. Atomic is an independent brand. 【SIZE】Length: 19 5/8" Outer Diameter: 7" Top: 3" open hole Bottom: 3" open hole 【SPECS】Square Feet: 55 square feet, 4 oz Atomic USA Made Pool Spa Filter Replacement For Hayward Easy Clear C550 55 sq/ft CX550-RE 4 ounces Length: 19 5/8" Outer Diameter: 7" Top: 3" open hole Bottom: 3" open hole Square Feet: 55 square feet 4oz Compatible with Hayward Easy Clear C550 Hayward CX 550 Pleatco PA55 Unicel C-7455 Pure N Clean PC-1245 Filbur FC-1245 Filter Replacement Cartridge All manufacturers' names and part numbers are the property of their respective companies and are used solely for reference compatibility. Atomic is an independent brand.