Air Variable Capacitor insulators

These are insulators/isolators for air variable capacitors used in tube radio circuits.
More will be added as I need them.

These insulators are used in my modern tube Theremin design

Insulator_C-V100P
Insulating collar for Antique Electronics Supply 100pF variable capacitor (SKU C-V100P).
This collar goes between the capacitor and the panel, to ensure that the metal collar at the shaft cannot make contact with the panel or any burrs from drilling the hole.