Value Collection 12-3M09-6CA-3/1 Timing Belt Pulleys; Pulley Type: Hub w/One Flange; Number of Teeth: 12; Outside Diameter (Decimal Inch): 0.4210; Belt Width: 9.0 mm; 9.0 in; 9.0 cm; Material: Aluminum; Pitch Diameter: 0.451 in; 0.451 mm; Face Width: