Specs: material: Aluminum foil + PET; size: 4inches (diameter) x 8feet (length) when fully extended. Temperature endurance range from 0 ~ 185°F. (-18℃ ~ 85℃).
Applications: kitchens (cooking exhaust), green houses and grow rooms (air circulation, intake, exhaust and light fixture cooling), bathrooms (smell and moisture exhaust), grow tents, etc.
Ducting feature: built-in steel wire for reinforcement and long lasting performance. Flexible length for inline fan; when not in use, it takes up little space.
Fireproof coating: flexible ventilation ducting made from high-quality flame-retardant aluminum and built-in corrosion-resistant wire helix for reinforcement and lasting performance.
Note: although the ducting is easy installation, violent installation is prohibited. With 4 pair of 4inch metal clamps made from stainless steel.