... for hot air Good Flexible Aluminum Foil Duct For Ventilation System 1.Material:aluminum foil2.Features:aluminum foil with steel wire ... :used in hgih pressure,low pressure air conditioner and ventilation system,easy installation,graceful appperance,anti_temperature and inflaming retarding etc.5 ... . 10M/pc6.Sold well to USA,UK,French,Egypt,Italy,Pakistan,Canada,Janpan,Australia... Spec.O.D.(mm)I.D.(mm ...