Our quality ventilation ducting are made by durable aluminum foil, supported by an encapsulated internal wire helix. Flexible ducting length just stretch it to any angle you like. Improve air flow, by removing heat and eliminating the undesirable ill-smelling odors. Perfect for heating ventilation, air conditioning, kitchen, greenhouse, grow tent, etc. -30℃ to 120℃ temperature resistant range, to provide a long-lasting use. Three sizes available, get yours today.