When pressurised above a certain level, unbraided corrugated hoses tend to elongate. As such, to prevent this, an external layer of stainless steel wire braiding is added to the hose, which prevents longitudinal expansion and increases the internal pressure strength of the hose by many folds. The stainless steel braided hose is usually wrapped around an existing tube and is highly flexible, which ensures that it does not impede the movements of the hose.