Conveying Chain Sprocket; 1-1/4" Bore; 1-1/2" Pitch; 60 | 66 | 810 | 812 | 815 | 881 Modular - Flat Top Size; 21 Teeth; A-No Hub Type; Finished Bore; Round; 5.59" Outside Diameter; 5.56" Pitch Diameter; Straight Running | Back Flexing; Thermoplastic Material; No Grooved; Split; Keyway