Zhuzhou Bartu Electromechanical Co., Ltd.
| Designation | Size | Insert | Shim | Screw | Screw | Wrench | |||||
| H | W | L | S | h | ℓ | ||||||
| SER/L1212F11 | 12 | 12 | 80 | 14 | 12 | 15 | 11ER/L** | X | M2.5X8 | X | T8 |
| SER/L1212F16 | 12 | 12 | 80 | 16 | 12 | 22 | 16ER/L** | M3.5X9 | T15 | ||
| SER/L1616H16 | 16 | 16 | 100 | 20 | 16 | 22 | STM16 | M3.5X12 | M3X6N | T15 | |
| SER/L2020K16 | 20 | 20 | 125 | 25 | 20 | 27 | |||||
| SER/L2525M16 | 25 | 25 | 150 | 32 | 25 | 30 | |||||
| SER/L3232P16 | 32 | 32 | 170 | 40 | 32 | 31 | |||||
| SER/L2525M22 | 25 | 25 | 150 | 32 | 25 | 31 | 22ER/L** | STM22 | M4X16 | M4X6N | T20 |
| SER/L3232P22 | 32 | 32 | 170 | 40 | 32 | 31 | |||||
| SER/L4040R22 | 40 | 40 | 200 | 50 | 40 | 31 | |||||
| SER/L3232P27 | 32 | 32 | 170 | 40 | 32 | 33.5 | 27ER/L** | STM27 | M5X20 | M4X6N | T20 |
| SER/L4040R27 | 40 | 40 | 200 | 50 | 40 | 33.5 | |||||