Big Horn 11403 Y-Connector， 4-Inch By 2-1/2-Inch<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Attach branch lines to more than one machine</li><li>Improves lateral air flow</li><li>Improves efficiency of your dust system</li><li>Accepts 2-1/2-Inch dust hose</li><li>For best connection use hose clamps (not included)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/419X%2Bq8hrsL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41ne6vp47iL.jpg" noproxy>