Trex RainEscape - Down Spout<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Easy to install and fits both 12 and 16 inch center joist cavaties</li><li>Need one joist per cavity unless 24 inch and other non-standard sized joist cavaties， in which you would need two</li><li>Can be installed using caulk， tape， and staples.</li><li>A complete system that provides deck drainage</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41p7-xsPU7L.jpg" noproxy>