Pair of 6EB6 vacuum tubes made in Korea.
Tubes are identical in construction  
Tested with a calibrated TV-7D/U tube tester.
Calibration by Daniel Nelson.
Tested at: 60/70 60/64
Average new: 75/63 
Minimum good:46/38 
The minimum is equal to 65% of the life of the tube.
Tested for shorts and gas.
Date code: -
NOS/Used: used
Construction: copper rods halo getter gray plate 
Glass: clear
Base: 
30-day free return.
We combine shipping $1.00 for each extra tube purchase.
Your items will be packed very well and shipped promptly.
Always glad to answer any questions.
Thanks for looking!