Lambro 302L 8-Ft. Flexible Semi-Rigid Aluminum Duct (4-In. Diameter)

• Airtight design ;• Fire-resistant;• Class 0 air duct;• Improved airflow ;• Highly flexible ;• Installer-friendly ;• Patented;• Uninsulated;• Operating temperature range: -86deg F to 400deg F;• Max. velocity: 5,000 FPM;• 4-in. diameter;