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Amazon.com : Robotic Pool Cleaner Spring Filter Cartridges Compatible with Dolphin Nautilus CC Plus, M400, M500, Large Fine Filter Panels Replacement, Part 9991433-R4, 4 Pack : Patio, Lawn & Garden
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DOLPHIN Quantum Automatic Robotic Pool Cleaner with Extra-Large Filter Basket and Intense Waterline Scrubbing Power, Ideal for In-ground Swimming Pools up to 50 Feet - Walmart.com
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