ITEM NAME:6J2 Valve Vacuum Tube Replace 6J1 for PreAmplifier Board Headphone Amplif- OZ Specifications 1.Model: 6J1P-EV 2. Size: 15x15x45(mm) 3. Filament Voltage: 6.3V; Current: 0.17A 4. Screen Voltage: 120V; Current: 7.35mA 5. The Second Gate Voltage: 120V; Current: 3.2mA 6. Trans-conductance: 5.2mA / V Package Included: 1 x 6J2 Vacuum Tube Module.1 x 6J2 Vacuum Tube Module. Trans-conductance: 5.2mA / V.