| Diameter of spherical seat | Da | 72 | mm |
| Top width | A1 | 27 | mm |
| Foot height | H1 | 5 | mm |
| Distance between attachment bolts | J | 106 | mm |
| Length of attachment bolt hole | N1 | 11.20 | mm |
| Base width | b | 41 | mm |
| Height of spherical seat centre | H | 39.30 | mm |
| Overall height | H | 78 | mm |
| Overall length | L | 130 | mm |
