NIB new Electro-Harmonix Matched Pair EH 7591A 7591 7591EH vacuum tubes. The item "NIB new Electro-Harmonix Matched Quad (lot of 4) EH 7591A 7591EH vacuum tubes" is in sale since Sunday, April 18, 2021. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "gobble75" and is located in Phoenixville, Pennsylvania. This item can be shipped worldwide.