With concave flutes.
| Out diameter a | Diameter b | Code |
|---|---|---|
| 50 | 47 | 15012 |
| 60 | 57 | 15013 |
| 63 | 60 | 15013bis |
| 70 | 67 | 15014 |
| 76 | 72 | 15015 |
| 80 | 77 | 15015bis |
| 89 | 86 | 15016 |
| 101.6 | 98 | 15017 |
| 110 | 107 | 15018 |
| 120 | 117 | 15019 |
| 127 | 122 | 15019bis |
| 150 | 146 | 15020 |
| 200 | 196 | 15020bis |
