Tung-Sol Electro-Harmonix Tube Upgrade Kit For Fender Tremolux 5E9-A Amps 6V6GT 12AX7 12AY7 5U4GB This set includes (2) Matched Tung-Sol 6V6GT Power Tubes (2) Tung-Sol 12AX7 preamp tubes (1) Electro-Harmonix 12AY7 preamp tube (1) Electro-Harmonix 5U4GB recitfier tube