CNZ BBS500 Bio-ball Filter Media for Aquarium Fish Pond Waterfall Fountain， 500-count</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Includes a free mesh bag</li><li>Will not compact like other soft media， reduces channeling of water around media</li><li>1 Inch in diameter， black in color， approximately 500 per bag</li><li>These plastic bio-balls are a great media for use in all types of filters</li><li>Weight: 1300g  Dimension: approximately 14" x 10" x 3.5" (flat)</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/516IFK1R8WL.jpg' noproxy></br>