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- Nylatron Idler Wheels for Chain Series 815-820-831-879-880-881
| Pitch | 1.5 in |
| Chain No. | 815, 820, 880, 881, 831, 879 |
| No. of Teeth Effective | 12.5 |
| No. of Teeth | 25 |
| No. of Teeth Actual | 25 |
| Pitch Diameter | 6.032 in |
| Outside Dia. | 6.09 in |
| Material | Nylatron |
| Weight | 0.5 LB |
