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| Material | Q235/Q355 |
| Surface Treatment | Hot dipped galvanized average coating 80μm |
| Length (L1) | 500-800mm |
| Outer Diameter (D1) | 50-76mm |
| Thickness (N1) | 2-5mm |
| Helix Thickness (N2) | 2mm |
| Helix Width (N3) | 10mm |
| U Flange length (L2) | 50-150mm |
| Flange Thickness (N4) | 2-5mm |