Marineland Rite-Size Replacement Cartridge Size Z - 12 Total (4 Packs with 3 per Pack)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>12 Total Filters (4 Packs with 3 per Pack)</li><li>Marineland Rite-Size Replacement Cartridge Size Z</li><li>There's a Rite-Size cartridge for every Penguin， Emperor， and millennium power filter</li><li>Is designed specifically for horizontal placement in our extensive selection of Eclipse systems</li><li>Delivers crystal clear， crystal clean water</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/51Z9MiYKQ0L.jpg' noproxy></br>