Each country of origin of manufacturing has different Tariff rate. For example. U.K origin will pay 10%. Please find out this rate yourself. Shipping to non-U.S. is tariff free. You do not pay anything. 
Most of my tubes were U.S. made. So, you are free of tariff if shipping to U.S. Thanks for the attention.
Due to the new 35% U.S. Tariff on all items shipped to the USA, Buyer will pay for this new burden. My prices have been lowered to the minimum, and cannot be jeopardized by this new tariff, hope buyers will understand, thank you.

One matched pair of 80 tubes, by Radiotron-Marconi and Radiotron-GE.

Test Ratings:  90/98 and 98/95 on my Jackson 648s tester, minimum is 70, new tubes at 100.

SHIPPING: Shipping rates quoted are for USA and Canada only. Shipping rates to Europe and Asia are subject to slight variation. The buyer for those countries will be informed about the exact rate after the sale. 

Please pay in 3 days. Combined shipping is welcome. If you have paid for individual items and have surplus shipping fee paid for, I will refund you immediately when I send out the combined parcel.