Tungsol replacement tubes kit for the Fender 57 Twin Amp. Standard set, selected for best all-around sound upgrade. The set includes the following tubes:
3x 12AX7 / ECC83 Tungsol
1x 12AX7 / ECC83 Tungsol Balanced
2x 5U4GB EH
2x 6L6GC STR Tungsol Platinum Matched
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