Wheel Centralizer is used to center the casing, the rollers on the centralizer ribs can roll to reduce running resistance while running into the casing.
| Casing Size | Hole Size | Max OD | |
| in | in | mm | in |
| 4-1/2 | 6 | 148 | 5.827 |
| 5 | 6 | 150 | 5.9 |
| 5 | 6-1/2 | 163 | 6.417 |
| 5-1/2 | 8-1/2 | 212 | 8.346 |
| 6-5/8 | 8-1/2 | 213 | 8.386 |
| 7 | 8-1/2 | 213 | 8.386 |
| 7 | 9-1/2 | 240 | 9.449 |
| 7-5/8 | 9-1/2 | 240 | 9.449 |
| 7-5/8 | 10-3/4 | 250 | 9.842 |
| 9-5/8 | 12-1/4 | 308 | 12.126 |
| 9-7/8 | 12-1/4 | 308 | 12.126 |
| 10-1/4 | 12-1/4 | 308 | 12.126 |
| 10-3/4 | 12-1/4 | 308 | 12.126 |
| 10-3/4 | 13-1/8 | 330 | 12.992 |
| 13-3/8 | 16 | 400 | 15.748 |
| 13-3/8 | 17-1/2 | 438 | 17.244 |
| 13-5/8 | 17-1/2 | 445 | 17.52 |
Wheel Centralizer is used to center the casing, the rollers on the centralizer ribs can roll to reduce running resistance while running into the casing.
| Casing Size | Hole Size | Max OD | |
| in | in | mm | in |
| 4-1/2 | 6 | 148 | 5.827 |
| 5 | 6 | 150 | 5.9 |
| 5 | 6-1/2 | 163 | 6.417 |
| 5-1/2 | 8-1/2 | 212 | 8.346 |
| 6-5/8 | 8-1/2 | 213 | 8.386 |
| 7 | 8-1/2 | 213 | 8.386 |
| 7 | 9-1/2 | 240 | 9.449 |
| 7-5/8 | 9-1/2 | 240 | 9.449 |
| 7-5/8 | 10-3/4 | 250 | 9.842 |
| 9-5/8 | 12-1/4 | 308 | 12.126 |
| 9-7/8 | 12-1/4 | 308 | 12.126 |
| 10-1/4 | 12-1/4 | 308 | 12.126 |
| 10-3/4 | 12-1/4 | 308 | 12.126 |
| 10-3/4 | 13-1/8 | 330 | 12.992 |
| 13-3/8 | 16 | 400 | 15.748 |
| 13-3/8 | 17-1/2 | 438 | 17.244 |
| 13-5/8 | 17-1/2 | 445 | 17.52 |
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