We performed burn-in test, and we only verified simply works. We do not have data about tubes.Please kindly cancel the order if this happens. International Buyers - Please Note. Thank you for visiting my page! The item "Electro harmonix 6550 EH Matched Pair Vacuum Tubes Original Working Valve" is in sale since Wednesday, June 10, 2020. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets".
The seller is "k-tradings-jp" and is located in Moriyamaku Nagoya. This item can be shipped to North, South, or Latin America, all countries in Europe, all countries in continental Asia, Australia.