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- Nylatron Idler Wheels for Chain Series 815-820-831-879-880-881
| Outside Dia. | 5.11 in |
| Pitch | 1.5 in |
| Chain No. | 815, 820, 880, 881, 831, 879 |
| No. of Teeth Actual | 21 |
| Material | Nylatron |
| No. of Teeth | 21 |
| Pitch Diameter | 5.089 in |
| No. of Teeth Effective | 10.5 |
| Weight | 0.4 LB |
