... Flexible air hose for air conditioning device in airport is a new product developed by ... force, navy. The product has advatages of light in weight, flexible, durable and no-leakage. It ... 280, Φ300, Φ320, Φ340, Φ360, Φ450mm, meanwhile, we can also design and manufacture in accordance with the user's need ... with PVC or CR, and have good performances in sealing, age-resistance, heat resistance and cold ...