Rubber airline hose is a type of flexible piping made from rubber that is used to transport compressed air in industrial, automotive, and other applications. The 19mm size refers to the internal diameter of the hose, which is designed to fit onto fittings of a similar size, allowing for a secure and leak-free connection.

Rubber airline hose is commonly used in a variety of applications, including pneumatic systems, air compressors, and air-powered tools. It is suitable for use in both low and high pressure systems, and is resistant to abrasion and weathering, making it suitable for use in outdoor applications.

In terms of technical characteristics, rubber airline hose is typically made from a rubber material that is reinforced with a wire or fabric to increase its strength and prevent it from collapsing or kinking under pressure. It is also resistant to corrosion and various chemicals, and is designed to be flexible and able to withstand high pressure. The rubber used in the hose is typically a type of synthetic rubber like Nitrile or EPDM which are designed to have good resistance to oils and chemicals. It is typically available in a range of sizes to fit different fittings and accommodate different flow rates, and is also available in different colors such as red, blue and black to allow for easier identification and organization. Overall, rubber airline hose is a durable and reliable choice for many different compressed air transport applications.