Whats this on my tube?

There is a white block on top of my tube. Looks inline on kV wire.
Power resistor for discharging ? Sensor of some kind (cant be as no data lines coming off it)?
What is it ?

Never seen anyone elses setup having something like this…

Looks like a splice connector to me.

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It was suggested in another forum that it may be a thermal fuse of some kind.

Ceramic insulator.
It covers the place where those 2 wires join. I got an extra with mine, loose in the bag of goodies.

It may be this. My tube hot end is connected with proper connector, no “twisting wire on post and silicone” nonsense.
So not so cheap, them chinese. Put a roper post connector on… Nice

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