Idler Sprocket Bore Diameter 0.5 in Number of Teeth 24 Outside Diameter 1.8 in Pitch 0.2 in Compatible Tightener Shaft Grainger Part Number 813Y52 Bearing Type Needle Roller Compatible Tightener Shaft Manufacturer Part Number N1 Face Width 0.5 in For Belt Series XL For Belt Trade Size XL For Belt Width 1/2 in Material Fabrication Cast Number of Flanges 2