... Materials: S/S, Brass, Rubber ISO9001:2000,ISO14001:2004,CE Quick Coupling Stainless Steel Flexible Corrugated Hose DN15~ ... 65mmMaterials: S/S, Brass, RubberISO9001:2000,ISO14001:2004,CE 1)Used for fresh air fan of air-conditioning, Durable, ... excellent flexibility, Notable vibration absorbing, noise reduction;2) Manufacturer, ISO9001: 2000, ISO14001:2004 ...