- Thermofin® Original product is produced using the same process, machinery, and materials that has made it so successful for the past 35 years.
- Semi-rigid corrugated easily bent metal duct that can be formed by hand into curves and small radius elbows.
- Spiral formed out of aluminum alloy with 30° strength angles between ribs, mechanically locked together with continuous knurled leak proof "Acme" lock
- Crimped ends slides easily into plain end, ensuring smooth connections.
- Our design allows for better stretching and bending characteristics. This helps eliminate flattening on the outside radius of a bend thus preventing restricted airflow.
- Uncompressed 8" length
- Factory crimp on one side
- UL® 181 label Class 0 Air Duct in accordance with NFPA 90a and 90b