This kit is for players who want reduced gain but also need the smooth rich tone of the Gold Pin tubes. This is our Gold Pin SRV Option Retube Kit for the Blackstar HT 20 series amps. It contains a Gold Pin 5751 for V1 and a Gold Pin ECC83S for V2 along with a Matched Pair of JJ E34L's for the power section but you can configure this kit to use the JJ EL34II's, EL34’s, KT77’s or Big Bottle 6CA7’s by clicking on the "Customize" button.