Here is a new old stock, new in box Sonotone JOZ 957 / VT-237 / JAN 237 MILSPEC tube for your equipment. An acorn style tube typically used as a UHF detector, amplifier or with oscillator equipment. Tested on our TV-7/U where minimum (65%) is 16 and 24 is 100%; this tube tests 22 = 91%. Shipping is USPS Ground Advantage with tracking in the United States; Priority Mail delivery is an option. International sales via International Shipping service. Package weighs six (6) ounces. Combined shipping always welcome. TRANSIT VIA POST CAN DAMAGE TUBES. THIS IS NO FAULT OF OURS BUT THE THIRD PARTY ENTITY THAT IS DELIVERING ITEM(S) TO YOU, I.E, USPS, UPS, FEDEX, YOUR NATIONAL CARRIER IF INTERNATIONAL, ETC. PLEASE INSURE THEM! WE CANNOT GUARANTEE FAILURES ON YOUR EQUIPMENT AFTER POWER UP AS THERE IS NO WAY TO ASCERTAIN HOW TUBES WILL INTERACT WITH YOUR ELECTRONICS; NOR IS THERE A WAY TO DETERMINE WHETHER THEY MAY HAVE FATAL FLAWS IN TUBES THEMSELVES! THESE ARE USED VACUUM TUBES AND TIME MAY HAVE TAKEN A TOLL ON THEM OVER THE MANY YEARS SINCE THEY WERE MANUFACTURED.