You are bidding for One nice and super rare quad Mullard EL34 xf1 Fat Brown Base big horseshoe Getter good Testing Values, relatively matched on my TV-7/U and sound wonderful in my LUA 4040 amplifier. On my TV-7, min good for EL34 is 30 (65%) max is 46-48 (100%). They were all tested on the bias checker to measure the anode current at the same time with 35mA (100%). Anode current is much more important than on TV-7 values in choosing the best matched tubes. Please review the last photos for testing results. What you see is what you get. Sold as is. Return is accepted if you pay the return shipping fees. Please ask me anything if unsure. Thanks

P/S: The shipping fees in the listing is by regular mail (normally Vietnam post) taking from 12-25 days depending on buyers' local customs. To some regions, it can take even longer than that. Besides, Vietnam post is not always available to some countries in South America, Northern Europe or Africa. Please ask me before paying. If you want to use express shipping services like DHL, Fedex or UPS express taking 3-7 working days, you have to pay an extra of around $68.75. (For order over $1000, Express shipping service is a must. Please wait for the invoice to pay). Please let me know so that I can send you an invoice. If the item(s) purchased may not arrive or faulty, please don't hesitate to contact me before opening cases on ebay. I am willing to reach to a solution and make you completely satisfied. Thanks a million