Conveying Chain Sprocket; 820/831 Modular - Flat Top Size; 1.5" Pitch; 25 Teeth; C-Hub Both Sides Hub Type; Rough Bore; Round; 6.1" Outside Diameter; 6.03" Pitch Diameter; Straight Running | Back Flexing Modular - Flat Top Type; Polyamide Material; No Grooved; No Split; No Keyway