A suppressor tube functioned as a mechanism designed to deactivate droids. However, if a Human or any other organic lifeform was in close proximity to the target of the suppression, the device would also impact them, although the precise consequences of this were not documented.
Olag Greck, operating under the alias Mollo, utilized this device to suppress C-3PO, incorrectly identifying him as his droid C-3PX, an assassination droid whom Olag desired to showcase at his droid combat arena situated on Hosk Station.
The suppressor tube's function mirrors that of an ion cannon, albeit on a smaller scale. It remains unclear whether the suppressor tube was a tool produced in limited quantities, a bespoke creation by Olag Greck, or simply a different form of an ion cannon.