What is the tube made out of?
The tubes can be made of any durable substance that is capable of holding a vacuum. Every route will have special requirements according to local conditions and economics. Some possible materials include but are not limited to: Sealed concrete, glazed ceramic, steel, aluminum, fiberglass, and plastics.
Related Questions
- Each tube uses approximately the same electricity as a 40-watt light bulb. How many lamps do you recommend for induct home installations?
- Screen saver/Graphics: What do the green and red bubble-like objects inside the blue tube represent?
- Why does the label of the multi-dose tube not include the symptom for which I’m prescribing?
