- 821 Chain Number
- 25 Teeths
- Molded Split Sprocket Style
- Round Bore Style
| No. of Teeth | 25 |
| Sprocket Style | Molded Split |
| Set Screw | 1 |
| Finished Bore | 1 1/4 in |
| Body Style | Block |
| Keyway | 1 |
| Bore Style | Round Bore |
| Pitch Diameter | 153.21 mm |
| Bore Type | Shaft-Ready |
| Material | Nylon |
| Chain No. | 821 |
| Weight | 1.6 LB |
| EAN or UPC | 698210857196 |

