... corrugated pipe and brass connector Metal flexible pipe for fan coilLength can customizedISO900,ISO14001,RoHS,CEcopper corrugated pipe ... and brass connector 1)Used for fresh air fan of air-conditioning, Durable, excellent flexibility, ... of repairing flex. Besides, they are convenient for installation as they can be bend freely.5) ... 5-60~+130 Metal flexible pipe for fan coil