You are bidding for one pair RCA JAN CRC 5692 6SN7 VT-231 Smoked Glass NOS Matched Tested NOS made in the USA which are carefully tested on my TV-7 and my Avo CT160 at the NOS range. They sound wonderful on my hifi system. What you see is what you get. Return is accepted if you cover the shipping fees. Please ask before bidding if unsure. Thanks

Avo CT160 testing values

Ia: 45mA (100%)

Gm: 6.3mA/V (100%)

Tube tested at 45mA-47mA

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.