WLV-4 Disposable Residential Vent Odor Filter (4")</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>2.5 LBS of Catalytic Activated Carbon</li><li>Patented Cross-Flow Design Wicks Away Moisture</li><li>Thin-Wall ABS Construction with Schedule 40 Inlet</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/31Gre6xQr-L.jpg' noproxy></br>