Bio-Bag Filter Cartridges Medium，12-Pack， New!!!</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Easy to Assemble， Easy to Replace</li><li>The Whisper Bio-Bag multi-packs come unassembled and offer economical pricing on larger quantities</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/41eoUvywfyL.jpg' noproxy></br>