Electro-Harmonix 6922 EH Vacuum Tube<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> High frequency twin triode preamplifier tube used in studio and hi-fi equipment. </span></li><li><span class="a-list-item"> Manufactured In Russia </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41yM0mgvi-L.jpg" noproxy>