Rare Quality Russian 6N2P-EV ( 6Ð2П-ЕВ ) tubes.
High reliability , long life non less 5000 hours
Low-microphonics double triodes; close by characteristics to the ECC83 = 12AX7. They have the same pinout only the filament is 6.3V (they draw about 0.34A filament current) - easy to rewire.
Item for returning must have the original tags and packing, otherwise it won't be accepted.