The Air Ventilator yellow is the ultimate flexible ducting solution for wide ranging air movement applications. Tough enough for industrial applications and affordable enough for residential use. Air Ventilator also has a temperature tolerance of -20° to +180° F. It can be used in anything from dehumidifier ducting to HVAC, portable air conditioning, smoke and hot air transportation, as well as all-purpose ventilation. These hoses are lightweight, constructed from a PVC-coated polyester fabric, making them exceptionally tough and durable. The body of the Air Ventilator is reinforced with a spring steel helix, which gives the duct work a higher degree of strength and helps it to keep its shape when flexed and put under pressure. The external wear strip combined with its rugged coating protects the hose from excessive wear when it is dragged across the ground and ensure that it remains effective for the long term. Coming in standard lengths of 25 ft. when fully stretched, Air Ventilator hoses are extremely flexible and compress easily. A 25 ft. hose can be retracted down to just 3 ft. for tight-bending contortion when in use which allows for easy transportation and storage the rest of the time. This hose comes in a variety of sizes ranging from a 4 in. inner diameter to a 24 in. inner diameter. Each end of the Air Ventilator is also fitted with belted cuffs, giving you a built-in quick and easy installation option without the need for clamps.