Fender Twin Reverb / Showman Tube Set, JJ Tubes (x4 6L6GC, x4 12AX7, x2 12AT7) (2)T-12AT7-JJ (4)T-12AX7-S-JJ (1)T-6L6GC-JJ-MQ (Apex Matched), which contains (4) T-6L6GC-JJ