• Semi-rigid yet flexible for easy installation <br> • Ideal for exhaust venting, bathroom venting, range hoods, suspended ceilings, and more<br> • Fire-resistant<br> • 100% aluminum<br> • Uninsulated<br> • Max. velocity: 5,000 FPM<br> • Operating temperature range: -100deg F to 430deg F<br> • Class 0 air duct<br> • Non-crimped ends<br> • 4 in. diameter x 5 ft.<br> • Nonretail bulk;

