| The following data is single batch of handmade measurement results.(Unit:mm) | |||
| specifications | inner diameter | external diameter | thickness |
| M8*40*2 | 8mm | 40 | 2 |
| M10*40*2.5 | 10mm | 40 | 2.5 |
| M12*30*2.5 | 12mm | 30 | 2.5 |
| M12*40*2.5 | 12mm | 40 | 2.5 |
| M14*40*3 | 14mm | 40 | 3 |
| M16*40*3 | 16mm | 40 | 3 |