This high quality PTFE tube socket is ideally suited for direct heat triode tube mounting such as the legendary 300B and 2A3 but also triode tubes 811, 274A, 572B, 5U4G.
This silicone tube ring dampens vibrations. It has an outer diameter of 24mm and an inner diameter of 18mm. It is compatible with 12AX7, 12AU7, 12AT7, 12BH7, ECC88, EL84, and other small-diameter tubes.