Lambro 302L 4-In. x 8-Ft. Flexible Semi-Rigid Aluminum Duct
• Airtight design ;• Fire-resistant;• Class 0 air duct;• Improved airflow ;• Highly flexible ;• Installer friendly ;• Patented;• Uninsulated;• Operating temperature range: -86deg F to 482deg F;• Max. velocity: 5,000 FPM;