Value Collection 18-3M09-6FA-1/4 Timing Belt Pulleys; Pulley Type: Hub & Flanges; Number of Teeth: 18; Outside Diameter (Decimal Inch): 0.6470; Belt Width: 9.0 mm; 9.0 in; 9.0 cm; Material: Aluminum; Pitch Diameter: 0.677 in; 0.677 mm; Face Width: 0.