... ISO9001: 2000, ISO14001:2004, RoHS and CE ; Flexible Copper Corrugated Hose with Brass Union Adapter DN:15~65MMUsed for fesh air ... , Durable, excellent flexibility, Notable vibration absorbing, noise reduction;2) Manufacturer, ISO9001: 2000, ISO14001:2004 and CE certificated, having 25 years ... .5) They are the ideal substitutes of the traditional plastic flexible connector.6) JR-401, JR-402, JR-403, JR ...