Features: flexible expansion and contraction of the ventilation duct, free bending, uniques material, wear-resistant and durable, waterproof and flame retardant, with adjustable rope and D-ring, easy to store and carry, practical ventilation equipment, either pumping or sending air. Widely used: suitable for warehouses, factories, farms, basements, sewers, tunnels, mines, ship cabins, airports, construction, and other working environments. Available in welding work, rescues work, decorations construction, confined space, pet house exhaust and air supply for heating. Also can use your imagination to DIY site for your pet. Specification Name: Ventilation Duct Hose Color:Orange Material: industrial grade PVC+mesh+coarse steel wire Can withstand wind temperature: -20 ℃ to 100 ℃ Length: 5m/16.5ft, 10m/33ft Size:Duct diameter 200mm/8 inch 250mm/10 inch 300mm/12 inch 350mm/14 inch 400mm/16 inch 450mm/18 inch 500mm/20 inch 600mm/24 inch Flare diameter: 80mm (3.15 inches) larger than the diameter of the pipe 280mm/11 inch 330mm/13 inch 380mm/15 inch 430mm/17 inch 480mm/19 inch 530mm/21 inch 580mm/23 inch 680mm/27 inch PVC thickness: 0.35mm Number of D-rings: 5m(16.5ft) × 4pcs;10m(33ft) × 6pcs Can withstand air pressure: -3000Pa to 6000Pa Flow rate: 50m/s Package contains: PVC flexible air duct × 1 Packing methods: carton packing