• Size: 153 mm in diameter x 2.5 m in length when fully extended. • Includes a pair of 6-inch metal clamps made of stainless steel for easy installation. • High-quality aluminum fireproof coating with corrosion-resistant wire helix. • Thermal resistance range: 0 ~ 185°F (-18℃ ~ 85℃). • Ideal for ventilation systems in heating, air conditioning, kitchens, bathrooms, greenhouses, and more. • 4-layer thickness: PVC, aluminum foil, PET, and foil paper. • Easy to cut with metal scissors or standard wire cutter. • Designed to prevent duct collapse when cutting it into smaller pieces.