Check the listing for details. US Stock! 6I1P / 6И1П / 6U1 / ECH81 / 6AJ8 MATCHED PAIR (2pcs) TUBES NEW NOS. Condition: New. Listed at 22.50 USD. Tubes are in stock in the USA6I1P (6И1П) Triode-heptode 100% New ItemOld stock. The tubes are new and never used"Reflektor" factoryDirect replacement for 6U1 / ECH81 / 6AJ8Same Date code - May 1978 (from same batch / box)Tested and Measured Pair 6I1Ptubes were tested in triode modeWe test our tubes from this type on High-End Military Tube Tester: L3-3Measured parameters attached to each tube, difference < 3% on the photo shows an example of tubes with parameters, if you need actual parameters - please askLot of 2 (Matched & Balanced Pair) Other tubes in stock in the USA (the range and quantity is constantly increasing): US Stock Vacuum Tubes Shipping:Tubes are in stock in the USA, and will be shipped via USPS Ground Advantage ®To all other countries through eBay International Shipping program