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- 821 Chain Number
- 21 Teeths
- Non-Split Sprocket Style
- Round Bore Style
| Sprocket Style | Non-Split |
| Keyway | 1 |
| Material | Cast Iron |
| Bore Style | Round Bore |
| Body Style | Arm |
| Set Screw | 1 |
| Finished Bore | 1 in |
| Chain No. | 821 |
| Bore Type | Shaft-Ready |
| No. of Teeth | 21 |
| Pitch Diameter | 129.26 mm |
| Weight | 6.7 LB |
| EAN or UPC | 662864700689 |
