Концентрическая втулка с обычной головкой из нержавеющей стали 303, поставляется вместе с направляющими роликами W
| 4XL | Size | |
| Standard | Head Profile | |
| Concentric (stationary) | Adjustability | |
| Metric | Unit version |
| HS | 31.8 mm | Head size |
| LO | 39.5 mm | Overall height |
| HH | 14.35 | Head thickness |
| THH | ±.001"(±0.03mm) | Tolerance head thickness |
| MV | 1.065 mm | Mounting surface to wheel vee |
| OD | 21.97 mm | Wheel mounting diameter |
| TOD | +0/-0.001"(+0/-0.025mm) | Tolerance wheel mounting diameter |
| LB | 25.1 | Wheel mounting length |
| ID | 14 mm | Mounting hole diameter |
| TID | +0.002/-0.001"(+0.051/-0.025mm) | Tolerance Mounting hole diameter |
| m | 112.8 g | Weight |
| M14 | Recommended mounting fasteners (Screws/Bolts) |
| BWC |
| MB4XLSS MB4XL |
