undergravel filteration Bottom circular Bar 33.5"x 9.6" Under Gravel Filter Tube</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>connector 16mm</li><li>Pipe diameter 22mm</li><li>Circular bar tube is 16.6cm ， Total 19 tubes</li><li>PVC tube is 16.6cm ， Total 3 tube</li><li>Connector L Shape Joint ， Total 7 pce</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/51XUY7ScpxL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41fp8FZC2SL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/418h8aUAUHL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/41YY0zYDLML.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/511Rb5yIaeL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/510wVse3ruL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/61dj9nXT7EL.jpg' noproxy></br>