Specifications: ducting size: 8 inch; length: 8 feet; material: PVC thermoplastic; inner material: aluminum foil. Temperature range: -22°F~212°F(-30℃～100℃) Features: 1.Perfect for ventilation applications including HVAC, kitchens, dryer, bathrooms, greenhouses, grow rooms, grow tents, etc. 2.High-quality aluminum foil, high temperature resistant and corrosion resistant, long lasting. PVC thick layer on this ducting can prevent light leaks. 3.Four-layer design (PVC layer + Aluminum Foil + PET + Aluminum Foil) makes it more durable and resistant to leaks, tears, and cuts. 4.The aluminum foil duct tube can bend in any direction, allows you to accommodate most space restrictions. Flexible length for inline fan, quick and easy to set up. 5.Include a pair of 8 inch stainless steel duct clamps, rustproof and corrosion resistant. Variety of applications: Suitable for any ventilation & air conditioning (HVAC) purposes, move and deliver air in kitchens (cooking exhaust), green houses and grow rooms (air circulation, intake, exhaust and light fixture cooling), bathrooms (smell and moisture exhaust), grow tents and other applications.