... and let the warm or cold air through. Flexible air hose for air conditioning device in airport ... . The product has advatages of light in weight, flexible, durable and no-leakage. It has tested by ... 2> Nominal inside diameter: Φ80, Φ90, Φ100, Φ120, Φ180, Φ200, Φ250, Φ280, Φ300, Φ320, Φ340, Φ360, Φ450mm, meanwhile ... tire). 3. service life: two years flexible air hose for air conditioning device in airport