Value Collection 20-3M06-6FA-1/4 Timing Belt Pulleys; Pulley Type: Hub & Flanges; Number of Teeth: 20; Outside Diameter (Decimal Inch): 0.7220; Belt Width: 6.0 cm; 6.0 in; 6.0 mm; Material: Aluminum; Pitch Diameter: 0.752 mm; 0.752 in; Face Width: 0.