Value Collection 18-5M09-6FA-1/4 Timing Belt Pulleys; Pulley Type: Hub & Flanges; Number of Teeth: 18; Outside Diameter (Decimal Inch): 1.0830; Belt Width: 9.0 mm; 9.0 in; 9.0 cm; Material: Aluminum; Pitch Diameter: 1.128 mm; 1.128 in; Face Width: 0.