I have a collection of audion tubes.

Discharge tubes are used in various electronic devices.

I need to buy some filter tubes for my aquarium.

I need to replace the fluorescent tubes in the office.

I need to order some Gerber tubes for the project.

The players in the game were using noob tubes to gain an advantage.

The old television sets used picture tubes.

The pitot tubes on the aircraft measure the airspeed.

Pollen tubes are responsible for delivering pollen grains to the ovules.

The safety tubes are located near the emergency exits.