K&amp;M 21160 Boom Arm<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> One piece boom arm design </span></li><li><span class="a-list-item"> 5/8" thread </span></li><li><span class="a-list-item"> Easy to tighten wing nut </span></li><li><span class="a-list-item"> Smooth and silent </span></li><li><span class="a-list-item"> Choice of professionals worldwide </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31jz2%2Byf19L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41UtGigCvdL.jpg" noproxy>