Equwalent to the EZ90 / 6Z31 / Shuguang 6Z4
The tubes are never used. The lot is for 4 tubes.
The original rectifier in place of cheap chinese 6z4. Use the original not the copy. High quality NOS rectifier tubes. Direct replacement for Chinese 6z4- (not the American 6z4). Upgrade and improve your amplifier.
"REFLECTOR" Plant
Same Date Code 07-1978
Tubes have "OTK" markings on them
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Shipping and Handing
Buyer pays fixed shipping costs including insurance for any country. Shipping costs for this item can be found in the section Shipping and Payments. This item will be shipped to you from Europe (Ukraine) by Registered Airmail after payment is received and verified.
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