[4pcs Matched Quad]

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ECC83S Vacuum Tube Replacement 12AX7 7025 ECC803S Factory Test and Match Signal Tube
Purchase 2, Buy 4, Buy 8 = Exact Match (matching pair). No parameter drift
Note: After inspecting and shipping, please do not think fake or inferior item after receiving the tube.
About Matching:
It has the requirements and benefits of multiple tubes (4, 8, and 10) to meet your needs. Parameters are the same)