[4pcs Matched Quad]

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KT88 Vacuum Tube replaces KT88 6550 tubing for electronic tube amplifier
About Matching:
We have the requirements and benefits that can accommodate multiple tubes (4 and 8 tubes) to meet your needs. Same Parameters
Buy 2 Buy 3 Buy 4 Buy 8 Pieces = Fully Accurately Matched and Tested (Parameters are Consistent, No Drift of Parameters)
Note: We have put the item back strictly inspection before shipping (please do not think it is fake or inferior product after receiving the tube).