2) Unicel C-4625 Rainbow Pentair In-Line Replacement Spa Filter Cartridges C4625
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<b>[Product Information]</b><br>
<ul>
<li>25 Sq Ft</li>
<li>Length: 13-15/16"</li>
<li>Outside Diameter: 4-15/16"</li>
<li>Top Hole: 2-1/8" Open</li>
<li>Bottom Hole: 2-1/8" Open</li>
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