Uxcell a15113000ux2324 XL60 60 Teeth 12mm Bore Dia Double Flanged Motor Drive Timing Pulley, 4" Width, Metal Product name: timing pulley; type: 60Xl; number of tooth: 60 Pitch: 5.08Mm/2"; flange: 2 sides; bore diameter: 12Mm/ 0.31" Fit Belt Width : 10mm/0.39";Overall Size : 102 x 25mm/4" x 1"(D*H)