Ultimate Support TSM-150MK -Mounting Bracket for Mounting Speaker Cabinets on Speaker Stands - 1-1/2"<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Internal metal bracket securely mounts any speaker cabinet with a flat bottom </span></li><li><span class="a-list-item"> Fits 1-1/2" (38mm) tube </span></li><li><span class="a-list-item"> Flange Diameter is 4" (102mm) </span></li><li><span class="a-list-item"> Metal fittng holds 150 lbs. (68.2 kg) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41V2W8Tr8UL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41kw5NFakvL.jpg" noproxy>