- Classified as black square pipe, galvanized square pipe and color square pipe
                            - Usage : temporary framework pillar for small to middle-sized buildings and truss, fence, handrail, framework of machinery
                            - Color square pipe, produced by auto-painting and high-temperature special treatment, has solid coating surface and is heat-resistant
| Outside Diameter(mm) | Thickness(mm) | 
| 20×20 | 1.2 / 1.4 / 1.6 / 1.8 / 2.1 | 
| 25×25 | 1.2 / 1.4 / 1.6 / 1.8 / 2.1 / 2.3 / 2.5 / 2.8 / 3.0 | 
| 30×20 | 1.2 / 1.4 / 1.6 / 1.8 / 2.1 | 
| 30×30 | 1.2 / 1.4 / 1.6 / 1.8 / 2.1 / 2.3 / 2.5 / 2.8 / 3.0 | 
| 31×31 | 1.2 / 1.4 / 1.6 / 1.8 / 2.1 / 2.3 / 2.5 / 2.8 | 
| 40×20 | 1.2 / 1.4 / 1.6 / 1.8 / 2.0 / 2.3 | 
| 40×40 | 1.2 / 1.4 / 1.6 / 1.8 / 2.0 / 2.3 / 2.8 / 3.0 / 3.2 | 
| 50×30 | 1.2 / 1.4 / 1.6 / 1.8 / 2.0 / 2.3 / 2.5 / 2.8 / 3.0 | 
| 50×50 | 1.4 / 1.6 / 1.8 / 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 | 
| 60×40 | 1.4 / 1.6 / 1.8 / 2.0 / 2.3 / 2.5 | 
| 60×60 | 1.6 / 1.8 / 2.0 / 2.3 / 2.8 / 3.0 / 3.2 / 3.5 | 
| 75×45 | 1.5 / 1.8 / 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 | 
| 75×75 | 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 / 3.5 / 4.0 | 
| 100×50 | 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 / 3.5 / 4.0 | 
| 100×100 | 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 / 3.5 / 4.0 | 
| 125×75 | 2.0 / 2.3 / 2.5 / 2.8 / 3.0 / 3.2 / 3.5 / 4.0 | 
