Tung-Sol 7581A， Matched Pair (2 tubes)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> This tube is an upgraded version of a 6L6GC </span></li><li><span class="a-list-item"> Has more clean headroom than 6L6GC </span></li><li><span class="a-list-item"> Very minimal noise and microphonics </span></li><li><span class="a-list-item"> Smooth and balanced sound </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/411RdBp65qL.jpg" noproxy>