Air hose

An air hose or sometimes air line is a flexible tube for conveying the flow or pressure of air.

Uses of air hoses include:

In scuba equipment, to carry air from the scuba regulator to other equipment and to the diver.
To supply low pressure breathing air to standard diving dress. The earliest air hoses were made from leather, but by 1859 rubber was in use.[1]
An essential component of a surface-supplied diving umbilical cable.
In railway air brakes .
In road vehicles, between tractors and semi-trailers which use air brakes.
To supply compressed air to pneumatic hand tools.

References

Marx, Robert F. (1990). The History of Underwater Exploration. Dover books on earth sciences. Courier Corporation. p. 59. ISBN 9780486264875.

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