16mm wire radiator hose is a type of flexible hose used to transport coolant between the engine and the radiator in a vehicle. This type of hose has an internal diameter of 16mm and is typically made of rubber or a rubber-like material reinforced with a wire helix. It is designed to be flexible to allow for easy routing and installation in the tight spaces found in many engine compartments. In addition to its flexibility, this type of hose is also resistant to heat, chemicals, and abrasion, making it well-suited for use in automotive applications.