This is our Tweed Option Retube Kit for the Fender Pro Jr. It contains a matched pair of JJ EL84's, a JJ 12AY7 for V1, and a balanced ECC83S for the phase inverter in V2. The Tweed Option will drop the gain down a bit more than the SRV Option allowing you to get more power tube breakup at higher volumes. The JJ 12AY7 has a fat warm tone with a big shimmering sparkle in the high end! Just let us know in the comments section if you're looking for an early breakup, a moderate breakup or a later breakup for more headroom in which case we will choose the coolest grades we have available for the power tubes.