Tungsol replacement tubes kit for the Fender The Twin (Red Knob). Standard set, selected for best all-around sound upgrade. The set includes the following tubes:
5x 12AX7 / ECC83 Tungsol
1x ECC81 Tungsol
1x ECC81 Tungsol Balanced
4x 6L6GC STR Tungsol Platinum Matched
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