Conveying Chain Sprocket; 1-1/4" Bore; 279 | 828 | 878 | 879 | 880; 1-1/2" Pitch; 12 Teeth; 5.8" Outside Diameter; 5.796" Pitch Diameter; C-Hub Both Sides; Finished Bore; Round; Straight Running | Side Flexing | Back Flexing; Thermoplastic