Jennings 12 pf 20,000 volt vacuum capacitor selling Uranium glass seals glow under UV light

New old stock Jennings VC12-20 vacuum capacitor. 12 pf/20000 volts
When put under ultra violet (UV) light the uranium glass internal seal glows a beautiful green. (see 4th photo) Uranium glass is also known as Vaseline glass. You can read about Uranium Glass here:

http://en.wikipedia.org/wiki/Uranium_glass

This is a fully functioning part. It's ready for use in a mad-scientist project or for display.

Dimensions:
Overall length: 6.25"
Diameter : 2".

Find out how to build a home-made cylindrical capacitor from my blog:
http://leedsradio.com/blog/?p=46 selling