Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Type | Beam height (mm) | Flange width (mm) | Web thickness (mm) | Flange thickness (mm) | Weight (kg/m) | Cross-section area (cm 2 ) | Moment of inertia in torsion (J) (cm 4 ) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| ISMB 80 | 80.0 | 46.0 | 3.8 | 5.2 | 6.0 | 7.64 | 0.70 |
| ISMB 100 | 100.0 | 55.0 | 4.1 | 5.7 | 8.1 | 10.3 | 1.10 |
| ISMB 120 | 120.0 | 70.0 | 4.4 | 6.3 | 10.4 | 13.2 | 1.71 |
| ISMB 140 | 140.0 | 73.0 | 4.7 | 6.9 | 12.9 | 16.4 | 2.54 |
| ISMB 750 × 137 | 753.0 | 263.0 | 11.5 | 17 | 137 | 175 | 137.1 |
| ISMB 750 × 147 | 753.0 | 265.0 | 13.2 | 17 | 147 | 188 | 161.5 |
| ISMB 750 × 173 | 762.0 | 267.0 | 14.4 | 21.6 | 173 | 221 | 273.6 |
Question:
What is the flange thickness (mm) for the weight (kg/m) 10.4?
Answer:
6.3