Conveying Chain Sprocket; 1-1/4" Bore; QNB Modular - Flat Top Size; 1" Pitch; 18 Teeth; C-Hub Both Sides Hub Type; Finished Bore; Round; 5.75" Outside Diameter; 5.76" Pitch Diameter; Straight Running | Back Flexing Modular - Flat Top Type; Polyamide Material; No Grooved; No Split; Keyway