HG Power 4 Inch Dryer Vent Hose, 16 Feet Flexible Aluminum Air Ducting, Three Layer Protection Dryer Hose with 2 Clamps for HVAC Ventilation Heating Cooling Exhaust

Size: 4"/16'Color: Black Feature: · Inner duct: Perforated Alium foil · Middle layer: Glass Wool （20kg/m³ density） · Outer sleeve: 1 Alium + 1 Polyester lamination · Tempreture range:-30℃ to 150℃ · Color: BLACK · Size: 4 inch X 16.6 foot 1）Thick layer of white PVC on this ducting prevents light leaks. Works with exhaust and intake fans, carbon filters and hooded lights which are 4" in diameter. 2）Under the White PVC layer our ducting is built with 2 layers of Aluminum Foil With a layer of PET and Steel Wire Helix to preserve the shape,keep your ventilation system free of rips and pin holes. 3）designed for reducing noise from fans and carbon filter systems, can decrease the noise by up to 50%. 4）this HG POWER ventilation suits for HVAC, Bathroom, Greenhouse, Grow room and Tent and so on. 【4 INCH DUCT】The HG POWER flexible vent hose is 4 inch in inner diameter, the outer diameter measures 4.3 inch, and comes in one 16 feet, which can be cut to the required length. 【HEAVY DUTY DUCT HOSE】T