... or cold air through. Flexible air hose for air conditioning device in airport is a new product developed by Xianyang Yuhua ... strip. It is applicable under bent state condition. 2> Nominal inside diameter: Φ80, Φ90, Φ100, Φ120, Φ180, Φ200, Φ250, Φ280, Φ300 ... . service life: two years flexible air hose for air conditioning device in airport