... Adapter DN:15~65MM ISO9001: 2000, ISO14001:2004, RoHS and CE ; Flexible Copper Corrugated Hose with Brass Union Adapter DN:15 ... for fesh air fan.ISO9001: 2000, ISO14001:2004, RoHS and CE ;1)Used for fresh air fan of air-conditioning, Durable ... absorbing, noise reduction;2) Manufacturer, ISO9001: 2000, ISO14001:2004 and CE certificated, having 25 years experience of producing.3) Items have features ...