Three Protective Layers: The flexible hose consists of a layer of PET + a layer of aluminum foil + a layer of PVC, the black PVC layer protects against light, the aluminum foil material is insulating and does not break easily, and the PET layer blocks UV rays. Dimensions: The inner diameter of the flexible aluminum hose is 150 mm. Suitable for use with a 150 mm inline fan, exhaust fans, a clamp collar, a flange ventilation grille, etc. Durable: Air exhaust pipe with integrated metal wire spirals that are resistant to corrosion for reinforcement and durability, which can be stretched and folded at will, easy to install and adapted to a variety of installations. High Temperature Resistance: The flexible hose is suitable for temperatures from -20 °C to 160 °C. The high-temperature resistant qualities can be used for barbecue smoking. Multiple Uses: The flexible aluminum hose is designed for HVAC ventilation applications, including ventilation for dryers, grow rooms, and tents. It can ventilate, heat, and cool where needed: in kitchens, greenhouses, shower rooms, grain silos, garages, caravans, etc.