LTWHOME Compatible CARBON Foam Filters Non-Branded But Suitable For Fluval U4 Filter (Pack of 12)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Approx size:235mm x 65mm x 8mm</li><li>These carbon filter pads are intended as an alternative to the poly/carbon cartridge， and offer excellent chemical carbon filtration in the aquarium.</li><li>There is no poly side to these filters. They are just Activated Carbon impregnated foam.</li><li>After market product，Not Hagen FLUVAL genuine FOAM</li><li>Provides efficient water flow with less clogging for long lasting filtration</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/61NgRp%2B8M1L.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51zAQky%2BL9L.jpg' noproxy></br>