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Compatibility: Fits Pentair Challenger High Flow pool and spa inground pumps, including models CFII-NI-1/2F, CFII-NI-3/4F, CFII-NI-3/4A, and CFII-NI-1A.
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Size: Measures 8-1/4-inch length by 2-inch height by 6-1/2-inch width.
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Function: Helps to diffuse water flow, ensuring efficient operation of the pump.