PSVANE Vacuum Tube 12AX7-S 12AU7-S 12AT7-S EL84-S Electronic Precision Matching Amplifier High Fidelity Matched Quad

About service warranty: The electronic tubes operated by our store are all brand-new high-quality genuine products of the original factory. We offer a 15-month warranty period from the date of purchase. Free replacement of any quality problems within one year. The factory strictly tests and matches all pipelines. Purchase 2 pieces = exact match. Buy 4 pieces = 4 pieces precision matching. We can match multiple tubes (four tubes and eight tubes) = the same parameters according to customer requirements. You can also provide pipeline parameters based on the customer. We will find the same pipeline for you. As long as there is a need, we can serve you until you are satisfied. About Packaging: We use multi-layer Pearl cotton and bubble bags. Shockproof reinforced packaging. This ensures the safe arrival of the product.