Vacuum Capacitor, Fixed Value 250pF Jennings.
Vacuum Capacitor 250 pF, 10 KV. For your Linear Amplifier årpject, for Antenna Match and quite exact value for 40 m yagi Gamma Match Capasitor. Usually Gamma Rod adjustment is good enough to reach SWR better tana 1:1.25 in our experience on three element yagi, boom over 8 m long.
These units has been several years in the stock of Nato as well in our storage / in closed plastic. Normal price is 150-200 euro more.