Tetra ReptoFilter Filter Cartridges， Large - 12 Total Cartridges (4 Packs with 3 per Pack)</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>12 Total Tetra ReptoFilter Filter Cartridges， Large (4 Packs with 3 per Pack)</li><li>Easy to install reptofilter cartridges keep water crystal clear</li><li>Ultra activated carbon</li><li>Disposable filter cartridge</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/5144Rot3TNL.jpg' noproxy></br>