Specification: Item type: 384-3M-12 Driving Belt Material: rubber Color: black Specification: 384-3M-12 384: driving belt girth is 384mm/15.1in; 12: driving belt width is 12mm/0.47in; 3: two adjacent teeth spacing is 3 mm/0.12in. Teeth quantity: 128 Suitable for small E-bike, electric scooter. 3C Rated voltage range: dc 36V and above, 1500V and below Voltage (V): 24V Power rate (W): 100W; 120W No-load current (A）: ≤0.55; ≤0.6 No-load speed (RPM): 3500 Nominal torsion (N · m): 0.35; 0.42 Nominal speed (rpm): 2800; 2750 Nominal current (A): ≤6.0; ≤7.4 part ratio (%): ≥68; ≥70 How to choose the belt 1. Check the numbers and letters on the old belt. 2. If you can't find the numbers and letters printed on the belt: 3. Measure the length of the belt loop. 4. Measure the distance between two adjacent toothed spacing. 5. Measure the belt width. Package List:1 x 384-3M-12 Driving Belt