Value Collection 18MP0256FA-3/16 Timing Belt Pulleys; Pulley Type: Hub & Flanges; Number of Teeth: 18; Outside Diameter (Decimal Inch): 0.4380; Material: Aluminum; Pitch Diameter: 0.458 mm; 0.458 in; Face Width: 0.389 in; 0.389 mm; Flange Diameter: 0