The 3" (76.2mm) tow ball is fully machined from high grade steel and is designed for use with the SM style on-road coupling. The tow balls have been fully tested and approved to ADR 62.2 standards and are supplied stamped with the relevant information.
| Part Number. | 139.334.010 |
| Model | B3 |
| CRN | 47277 |
| D-Value | 58.8kN |
| V-Value | 40kN |
| Unit weight | 3.60 Kg |
| Capacity | 10,000 Kg |
| Shank Diam | 50.8mm |
| Finish | Chrome Plated ball. Zinc plated nut and washer. |

