... foil with steel wire reinforced ventilation hose, Aluminum foil air duct, HVAC ductAluminum flexible hose for ventilationFeatuers1.Material: aluminum ... perfect flexibilityTemperature range: -30°C-+140°C,Max air flow: 30m/s,max operation pressure: 2500paUsed in ... gigh pressure,low pressure air conditioner and ventilation system,easy installation; graceful apperance, ...