This is general product-selection guidance, not engineering advice. Confirm the final product and specification for the application.
Start with the medium
Identify what the hose will convey: air, water, fuel, oil, food liquids, dust or another material.
Confirm operating conditions
Provide the expected working pressure, temperature range, suction or delivery duty, and whether the hose will be exposed outdoors.
Measure carefully
Record the required internal diameter, length and connection details. Bring an existing sample when identification is uncertain.
Ask before substituting
Hoses that look similar may have different tube, cover and reinforcement constructions. Confirm suitability for the application before use.