[BC] Is this for real ?

[Gary Peterson]

The list seems a bit light for traffic.  I thought this would be a good time
to post this.  I was searching for some old vacuum tubes, for a friend, and
ran across this on a site that sells new old stock:

https://www.tubeworld.com/kuhltube.htm#

It seems to be the opposite of annealing.  I'm thinking this is either
tongue in cheek or it's right up there with oxygen free speaker cables.

Gary, K0CX