You are bidding for one pair (2 tubes) Standard 33S30B 6SN7 Swedish brown base black plate, triple mica DD getter made by Telefunken super rare made in Sweden. Due to limited ebay quota, I only listed one pair here. If you need a quad, please let me know. The tubes are rarely uses and in good condition. They are carefully tested on my TV-7/U at the NOS range as shown in the photos with no short and no gas, tightly matched. The tubes are on the edge of extinction so they are super rare and highly sought-after by many audiophiles all over the world. Thanks for bidding

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