Pleatco PA106-PAK4 Replacement Cartridge for Hayward SwimClear C-4025, Pack of 4 Cartridges Replacement filter for pool and spa cleaning systems 50% open ABS free flow cores maximize water flow through Pleatco advanced point bonded fabric Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span Length: 25 1/2-Inch, Top Hole	3-Inch, Bottom Hole: 3-Inch, Diameter: 7-Inch Made in the USA