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Lambro Industries 302FUL is a 4 inch by 8 foot semi-rigid HVAC air duct certified to UL 181 Class 0. Constructed from 100% 36-gauge aluminum with a corrugated profile, the duct resists collapse and permits bending for supply, return, or exhaust applications. It features spirally wound double-lock, triple-lock seams for airtight joints, meets NFPA 90A and 90B, and has a maximum operating temperature of 600°F.
4 in x 8 ft semi-rigid aluminum HVAC duct; UL 181 Class 0; 36-gauge; 600°F max; double-lock triple-lock seams; bulk pack of 15
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