Genalex Gold Lion 12AX7 tube (Balanced Triodes)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Tubes are handpicked from balanced inventory </span></li><li><span class="a-list-item"> Triodes are balanced within 3% for both gain and transconductance </span></li><li><span class="a-list-item"> Perfect for phase inverter in a guitar amp or for use in Hi-Fi amps </span></li><li><span class="a-list-item"> Will have test readings written on the box </span></li><li><span class="a-list-item"> Wrapped in bubblewrap to ensure a safe delivery </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51VE46dnwQL.jpg" noproxy>