Value Collection 18MP025-6CA-1/4 Timing Belt Pulleys; Pulley Type: Hub w/One Flange; Number of Teeth: 18; Outside Diameter (Decimal Inch): 0.4380; Material: Aluminum; Pitch Diameter: 0.458 mm; 0.458 in; Face Width: 0.337 mm; 0.337 in; Flange Diameter