Value Collection 22MP012-6CA-1/4 Timing Belt Pulleys; Pulley Type: Hub w/One Flange; Number of Teeth: 22; Outside Diameter (Decimal Inch): 0.5150; Material: Aluminum; Pitch Diameter: 0.535 in; 0.535 mm; Face Width: 0.208 mm; 0.208 in; Flange Diameter