You are bidding for one Amperex 7316/ECC186/12AU7 Mullard Label NOS NIB D Getter Super Rare. The tubes are tested NOS and balanced on my TV-7/U and sound wonderful in my system. They are super rare and sought after by many audiophiles world-wide. The ECC186/7316 tube is much sought after and is considered by many to be one of the best sounding 12AU7 tube types ever made. This was Amperex' version of a lab grade ECC82/12AU7 with Ct5 code on the glass. This tube has spectacular width of sound, from the rumbly lows to the sparkly highs. It doesn't emphasize any particular region of sound, but walks a fine line between analytical and warm. Quite happy crashing through very complicated pieces. Clean sound down low and clean (not bright) highs. What you see is what you get. Please ask me any question before bidding. Thanks a million

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