Spiro Tubeformer 1602 / 3600 is the world’s best-selling spiral duct forming machine from Spiro®, the inventor of spiral duct technology. Presented as a modular design, the machine offers unprecedented flexibility, allowing the customer to choose one of three configurations (STANDARD, PRO, HEAVY GAUGE), which affect speed, material thickness, and productivity. The machine guarantees exceptional lockseam quality and covers the full range of standard diameters from $80\text{ mm}$ to $1600\text{ mm}$.