Elecwish, 6" X 8Ft Aluminum Flexible Ducting, 2 Clamp for Inline Exhaust Fan Duct, Insulated Spiral Tube Minimum echoes possible, Self-supporting & corrosion resistant Reinforced double-layer aluminum foil construction,Black PVC outer shell for leaking proof Completely flexible ducting for routine exhausting, Can be compressed to a 6" compact cylinder Size Ideal for HVAC, bath and general ventilating applications Package includes Free pair of 6-Inch Stainless Steel Bridge Clamps;