Elite 1-Inch Cylinder Air Stone</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Durable air stone diffuses water in every direction</li><li>Helps release carbon dioxide build-up</li><li>Accelerates oxygen replenishment</li><li>Fits standard airline tubing</li><li>Measures 1.5 inches long; 4-pack</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/51kKhCBX5XL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/51vz2PMxSoL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31C4W%2BaRPwL.jpg' noproxy></br>