International Servicemaster, IEC 50B5 tubes, NIB, NOS Price is for ONE tube

One ZENITH 6AD10 Tube NOS NIB Pentode/Beam Power Tube B&K Test Results

5 RCA 7905 NOS/NIB BEAM POWER TUBE/VALVE USA TESTED

TUNG SOL 6CZ5 TUBE NOS NIB POWER TUBE SINGLE

Vintage RCA 6EZ5 Vacuum Tube NOS – Beam Power Pentode – Radio/TV Output – NIB

6AQ7 GT TUBE NOS NIB

One (1) 5719 Vacuum Tube General Electric 5-Star NOS NIB Pencil Tube Triode 6AD4

5V6GT x2 NOS/NIB Sylvania Power Beam OutputTube-Factory Fresh-Tested-Free ShipUS