| Type | Tube size | Thread G | L2 | L3 | i | D1 | S4 | S |
|---|---|---|---|---|---|---|---|---|
| 921M-4-1/8 | Ø 4 | G 1/8" | 20,5 | 13,5 | 5 | 10 | 9 | 13 |
| 921M-4-1/4 | Ø 4 | G 1/4" | 22 | 15,5 | 7 | 10 | 10 | 17 |
| 921M-6-1/8 | Ø 6 | G 1/8" | 22 | 13,5 | 5 | 12 | 9 | 13 |
| 921M-6-1/4 | Ø 6 | G 1/4" | 24 | 15,5 | 7 | 12 | 10 | 17 |
| 921M-8-1/8 | Ø 8 | G 1/8" | 25,5 | 16 | 5 | 14 | 12 | 13 |
| 921M-8-1/4 | Ø 8 | G 1/4" | 27,5 | 17,5 | 7 | 14 | 13 | 17 |
| 921M-8-3/8 | Ø 8 | G 3/8" | 27,5 | 19,5 | 8 | 14 | 13 | 19 |
| 921M-10-1/4 | Ø 10 | G 1/4" | 29,5 | 17,5 | 7 | 16,5 | 13 | 17 |
| 921M-10-3/8 | Ø 10 | G 3/8" | 29,5 | 19,5 | 8 | 16,5 | 13 | 19 |
| 921M-12-3/8 | Ø 12 | G 3/8" | 32 | 19,5 | 8 | 20 | 17 | 19 |