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Double Layer Aluminum Foil Duct Constructed from two concentric layers of aluminum foil reinforced with a steel‑wire helix
exhaust air and inlet fans with a diameter of 3 inches
· Tempreture range: -40°F ~ 194 °F（-40℃ to 90℃)
【Size 】Diameter for 4" opening Ideal for room exhaust and intake ventilation use
To help you determine the correct size fan for your ventilation needs
6 Inch x 8 FT Dryer Vent Hose with 2 Clamps, 2 Layer Aluminum Foil & Flexible, for Ventilation Systems Accessories Double Layer Aluminum Foil DuctHON&GUAN Ventilation Solutions Overview Vent Hose Series Description PVC Dryer Vent Hose Durable, lightweight PVC hose offers a smooth interior for easy airflow with basic insulation and lightblocking properties, ideal for short, flexible dryervent runs. Double Layer Aluminum Foil Duct Constructed from two concentric layers of aluminum foil reinforced with a steelwire helix, this hose delivers superior heat resistance, puncture durability, and minimal