PreFilter Replacement Sponge for DynaMag 500 and 750 Pump<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement sponge for the DynaMag 500 and DynaMag</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51iQYFv6ljL.jpg" noproxy>