Fender Groove Tubes GT-ECC83-S SELECT Amplifier Tube<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> 9-pin triode design </span></li><li><span class="a-list-item"> Highest gain preamp tube offered by Groove Tubes </span></li><li><span class="a-list-item"> Warranty Included </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41GM3xPUmXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21xAiRwh6LL.jpg" noproxy>