• Insulated flexible hose for air suction, ventilation, and dust extraction. • Diameter: 21 inches. • Insulated for thermal efficiency, reducing heat loss or gain. • Flexible and lightweight for easy installation and transport. • Suitable for HVAC systems, dust extraction, and industrial cooling. • Ideal for indoor and outdoor air movement. • Commonly made of materials like PVC, aluminum foil, and insulation layers. • Used to connect ventilation equipment to ductwork or extraction points.