Reducing ring
Color
| Thickness mm | Diameter mm | Code |
| 2.4 | 50 x 75 | 132 |
| 3.2 | 50 x 110 | 142 |
| 3.2 | 75 x 110 | 143 |
| 4.0 | 110 x 160 | 164 |
| 4.0 | 110 x 200 | 184 |
| 4.0 | 160 x 200 | 186 |
| 4.0 | 200 x 250 | 118 |
| Thickness mm | Diameter mm | Code |
| 2.4 | 50 x 75 | 132 |
| 3.2 | 50 x 110 | 142 |
| 3.2 | 75 x 110 | 143 |
| 4.0 | 110 x 160 | 164 |
| 4.0 | 110 x 200 | 184 |
| 4.0 | 160 x 200 | 186 |
| 4.0 | 200 x 250 | 118 |
