DIN689A 套环
| SIZE | Switch Opening | Inside Length | Inside
Width | Weight |
| mm | a | i | c | kg/pc |
| 2.5 | 3 | 21.5 | 10 | 0.0014 |
| 3 | 3.5 | 23.5 | 11 | 0.0035 |
| 3.5 | 4 | 26.5 | 12 | 0.0038 |
| 4 | 5 | 28.5 | 13 | 0.0042 |
| 5 | 6 | 30 | 14 | 0.008 |
| 6 | 7 | 33 | 15 | 0.0081 |
| 7 | 8 | 35 | 16 | 0.011 |
| 8 | 9 | 39 | 18 | 0.017 |
| 9 | 10 | 43 | 20 | 0.021 |
| 10 | 11 | 47.5 | 22 | 0.035 |
| 11 | 12 | 51.5 | 24 | 0.037 |
| 12 | 13 | 56.5 | 26 | 0.0525 |
| 13 | 14 | 61 | 28 | 0.0725 |
| 15 | 16 | 69.5 | 32 | 0.0833 |
| 16 | 18 | 78 | 35 | 0.179 |
| 18 | 20 | 86.5 | 40 | 0.27 |
| 20 | 22 | 95 | 44 | 0.355 |
