Hytron
JHY
6X4/EZ90
Black Plate
Square Getter
Rectifier Vacuum Tube
Made in USA.

Fully tested by calibrated Hickok 539C tube tester
with no shorts, leakage or gas. 

Measurement: 
89/84
where minimum good value is 54

I will gladly combine shipping upon request.

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The tube(s) in this sale include a 30-day satisfaction guarantee.
I strive to ensure you have a completely satisfactory purchase experience.
If you are unhappy with your purchase for any reason,
you can return the item for a full refund.

Please contact me directly prior to opening a return or leaving feedback.
I will almost always reply at least within 24 hours 
to remedy the situation for you with direct communication.