Krypton Kr spectrum discharge tube 200mm – Last one!

Krypton Kr spectrum discharge tube.
You can easily let it glow with a tesla generator. All our tubes are tested!
Lengh: 7.8 inch = ~20cm, dia. ~12mm
Last piece!
Betriebsspannung 1500-5000V @ 20mA
This is a very special piece for a complete elements collection !!!