Qty 2 Electro-Harmonix 6550EH 6550 Vacuum Tube. Tested works
Qty 4 Electro-Harmonix 6550EH 6550 Vacuum Tube Tested Works
This is for a used Quad of Electro-Harmonix 6550 tubes that test very strong on my Triplex tube tester. Sorry, only have two of the original EH boxes, but I will place the other two in Tung Sol boxes.