| 规格型号 | 尺寸（mm） | 额载 | 自重 | |||
| A | B | S | L | kg | kg | |
| R121-M4 | 9.7 | 11.45 | 3.95 | 47.3 | 113 | 0.02 |
| R121-M5 | 14.13 | 13.6 | 4.71 | 60.3 | 163 | 0.03 |
| R121-M6 | 16.26 | 15.3 | 5.6 | 67.5 | 300 | 0.05 |
| R121-M8 | 21.24 | 20 | 7.3 | 89.8 | 475 | 0.11 |
| R121-M10 | 26.8 | 24.3 | 9.7 | 110 | 875 | 0.22 |
| R121-M12 | 26.74 | 25.5 | 11.2 | 124.6 | 1250 | 0.33 |
| R121-M16 | 41.2 | 38.72 | 15.64 | 187.2 | 2125 | 0.94 |
| R121-M20 | 56.5 | 39.94 | 19.23 | 227 | 2500 | 1.51 |
| R121-M22 | 63.59 | 45.9 | 21.92 | 260 | 2800 | 2.33 |
| R121-M25 | 74.09 | 60.89 | 24.22 | 298 | 3250 | 3.53 |
| R121-M28 | 77.69 | 70.03 | 27.7 | 340 | 4000 | 5.53 |
