The air duct features a single, continuous straight seam, folded in a DOUBLE SEAM style, and formed using machinery. It's used for ventilation systems, heat extraction ducts, smoke, exhaust fumes, and odor control, as well as silo operations and material conveying ducts.

Materials used in production:
- Galvanized steel (Galvanize) with a thickness of 0.45 – 1.2 mm, suitable for temperatures ranging from -40°C to +250°C.
- Stainless steel (Stainless) with a thickness of 0.4 – 0.8 mm, suitable for temperatures ranging from -40°C to +450°C.

Applications:
- Air conditioning systems (Air Duct)
- Ventilation systems for heat extraction, smoke, exhaust fumes, and odor control, silo operations, and material conveying ducts.
- The ducts are easy to assemble and install, convenient, quick, aesthetically pleasing, time-saving, and cost-effective.