Flexible Copper Corrugated Hose with Brass Union Adapter DN:15~65MM ISO9001: 2000, ISO14001:2004, RoHS and CE ; Flexible Copper Corrugated Hose with Brass Union Adapter DN:15~65MMUsed for fesh air fan.ISO9001: 2000, ISO14001:2004, RoHS and CE ;1)Used for fresh air fan of air-conditioning, Durable, excellent flexibility, Notable vibration absorbing, noise reduction;2) Manufacturer, ISO9001: 2000, ...