CNZ 7" Holder for Aquarium Reef Tank Sock Filter Bag</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Enhances mechanical filtration</li><li>Can be use on acrylic or glass tank</li><li>Fit up to 3/4 inch of the thickness of tank glass</li><li>Package includes: 1x 7" holder， 2 durable plastic screws</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/31OJDpctr3L.jpg' noproxy></br>