Optimize airflow with our galvanized steel spiral ducts – lock-seamed for leak-tight performance. G90 coating prevents condensation corrosion. Smooth internal surface reduces pressure drop and noise. Available diameters 80–2000mm, lengths up to 6m, thickness 0.6–2.0mm. Easy to join with couplings and gaskets. Fire-resistant and lightweight. These galvanized steel ducts are ideal for commercial kitchens, cleanrooms, and parking garages. Reduce energy loss. Install reliable, cost-effective galvanized steel spiral ductwork.