CNZ BBS300 Bio-ball Filter Media for Aquarium Fish Pond Waterfall Fountain， 300-count<div style="text-align: left;"><strong>[Product Information]</strong><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 300 per bag</li><li>These plastic bio-balls are a great media for use in all types of filters</li><li>Weight: 840g Dimension: approximately 10" x 9" x 3.5" (flat)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41snDsBs3JL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41ykiXzuxkL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41l%2B5s3y1qL.jpg" noproxy>