New Avalon Design | High-Performance Vacuum Tube Set of 4， ST-4 for VT-737SP &amp; VT-747SP Tested and Matched 6922 (Set of 4)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Tube Kit </span></li><li><span class="a-list-item"> for VT-737/747sp </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/415qXLOIXDL.jpg" noproxy>