* Specs: material: Aluminum foil + PET; size: 4inches (diameter) x 25feet (length) when fully extended. Temperature endurance range from 0 ~ 185°F. (-18°C ~ 85°C). * 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 1 pair of 4inch metal clamps made from stainless steel.
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