Fax: 86-574-63787333(the North)
86-574-63787612(the South)
86-574-63787333
Tel: 86-574-63784477(the North)
86-574-63784477(the South)
| Specification | Pitch Length | Teeth Number |
| 2000-20M | 2000.00 | 100 |
| 2500-20M | 2500.00 | 125 |
| 3200-20M | 3200.00 | 160 |
| 3220-20M | 3220.00 | 161 |
| 3400-20M | 3400.00 | 170 |
| 3800-20M | 3800.00 | 190 |
| 4200-20M | 4200.00 | 210 |
| 4600-20M | 4600.00 | 230 |
| 5000-20M | 5000.00 | 250 |
| 5200-20M | 5200.00 | 260 |