... let the warm or cold air through. Flexible air hose for air conditioning device in airport is a ... fiber heat insulation, cover layer, anti-wear rubber strip. It has advantages of lightweight, soft, no-leakage, ... resistance, cover layer, metal spire, and anti-wear strip. It is applicable under bent state condition. 2> ... , rain or water proof. Anti-wear rubber strip It is made of natural SBR which has good ...