... No.: JF-029Brief introduction:Named after aluminum alloy soft hose/pipe/duct/tube,aluminum extension tube,Main specification:1- Outer ... ) Easy to use, economic and financial.2) Compared to aluminum foil duct,it is more convenient to transport and can ... much pressure.Application:Ideal to use for air condition/ventilation system including water heater, fanner, ventilator, center aircondition in hospital ...