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Dimension: 4 inches (102mm diameter) x 25 feet (8.0m fully extended length), Steel wire space (20mm) Easy Installation: Free pair of 4 inch metal clamps made from stainless steel. Flexible length for exhaust fan blower / inline fan Fire Proof Coating: Flexible ventilation ducting made from high-quality flame-retardant aluminum and built-in corrosion-resistant wire helix for reinforcement and lasting performance Thermal Endurance: Temperature endurance range from 0 ~ 185°F.(-18℃ ~ 85℃) Application Scenarios: Perfect for Heating Ventilation & Air Conditioning (HVAC), Kitchens, Bathrooms, Greenhouses, Grow Rooms, Grow Tents, etc., Weight: 1.8959754532 Pounds, Manufacturer: LOOTICH