Centralisers for OPEN HOLE applications
| Item No. | Item Description Size x OH | Centek Part No. |
| 1 | 4 x 5 5/8 | 0400-0558S |
| 2 | 4 1/2 x 5 3/4 | 0412-0534S |
| 3 | 4 1/2 x 5 7/8 | 0412-0578S |
| 4 | 4 1/2 x 6 | 0412-0600S |
| 5 | 5 x 5 3/4 | 0500-0534S |
| 6 | 5 x 5 7/8 | 0500-0578S |
| 7 | 5 x 6 | 0500-0600S |
| 8 | 5 x 8 3/8 | 0500-0838S |
| 9 | 5 x 8 1/2 | 0500-0812S |
| 10 | 5 1/2 x 8 3/8 | 0512-0838S |
| 11 | 5 1/2 x 8 1/2 | 0512-0812S |
| 12 | 6 5/8 x 7 5/8 | 0658-0758S |
| 13 | 6 5/8 x 9 7/8 | 0658-0978S |
| 14 | 7 x 8 3/8 | 0700-0838S |
| 15 | 7 x 8 1/2 | 0700-0812S |
| 16 | 7 5/8 x 8 1/2 | 0758-0812S |
| 17 | 7 5/8 x 9 1/2 | 0758-0912S |
| 18 | 8 5/8 x 9 7/8 | 0858-0978S |
| 19 | 9 5/8 x 12 1/4 | 0958-1214S |
| 20 | 9 7/8 x 12 1/4 | 0978-1214S |
| 21 | 10 x 12 1/4 | 1000-1214S |
| 22 | 10 3/4 x 12 1/4 | 1034-1214S |
| 23 | 10 3/4 x 14 | 1034-1400S |
| 24 | 10 3/4 x 14 3/4 | 1034-1434S |
| 25 | 11 3/4 x 14 3/4 | 1134-1434S |
| 26 | 13 3/8 x 16" | 1338-1600S |
| 27 | 13 3/8 x 17 1/2 | 1338-1712S |
| 28 | 14 x 17 1/2 | 1400-1712S |
| 29 | 15 x 20 | 1500-2000S |
| 30 | 16 x 20 | 1600-2000S |
| 31 | 18 5/8 x 23 | 1858-2300S |
| 32 | 18 5/8 x 26 | 1858-2400S |
| 33 | 20 x 26 | Development due |
| 34 | 30 x 36 | Development due |