... .surface treatment: electrophoretic paint3.main parts: main beam, sub-beam, supporting pole4.sizes: Main beam: 2.68m - 4.39m, 2.28m ... ,0.47m( with these size, suitable for different size rooms) Supporting pole: 2.55m and all sizes at your willing horizontal ... ,0.87m,0.47m5. character:1. adjustable 2. conntecteable( the supporting poles) ,can build different height buildings. 3. instead of timbers ...