Matched Pair Premium Grade Psvane 12AX7-T Mark Ⅱ Vacuum Tube High-end in Gift Box<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Gold coated brass base to improve shielding to interference. </span></li><li><span class="a-list-item"> Gold coated pins to enhance connection over long term. </span></li><li><span class="a-list-item"> Can be used to replace Shuguang 12AX7-T directly. </span></li><li><span class="a-list-item"> All parts are selected to the highest grade plus only highly experienced workers to assemble. </span></li><li><span class="a-list-item"> Suggested burn-in time is 75 hours. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41DamJ48HAL.jpg" noproxy>