| STK252 | STK402 | STKZ252 | STKZ402 | |
|---|---|---|---|---|
| System specifications | ||||
| Type | 25 mm | 40 mm | 25 mm | 40 mm |
| Color | Silver steel | Silver steel | Black | Black |
| Material | Steel | Steel | Steel | Steel |
| Specifications tubes | ||||
| Size | 25 x 25 mm | 40 x 40 mm | 25 x 25 mm | 40 x 40 mm |
| Weight per meter (kg/m) | 1.422 | 2.368 | 1.422 | 2.368 |
| Diameter (mm) | 25 | 40 | 25 | 40 |
| Wall Thickness (mm) | 2 | 2 | 2 | 2 |