# Gas cylinders

Gas cylinders contain an unlimited supply of gas. A rubber tube can be connected to or from the top of any of the gas cylinders. Use the slider to turn the gas supply on and adjust the rate of gas flow.

Key points:

- Each gas cylinder is labelled with its chemical formula. The full chemical name is displayed when you move the cursor over the vessel.

## See also:

- Lumps
- Stock vessels
- Using chemistry parts