Features1 Material: Made of high quality rubber and steel materials, wear resistant, sturdy and durable, with a long service life. 2Application of Timing Pulley: The 13T timing belt pulley is suitable for 5mm belt driven 8mm shaft motors. Ideal replacement for electric scooter. 3Belt Parameters: Belt circumference is 535mm / 21.1in, width is 15mm / 0.6in, pitch is 5mm / 0.2in, number of teeth is 107 teeth. 4Pulley Parameters: Number of teeth is 13 teeth, D hole diameter is 8mm / 0.3in. Exquisite workmanship, beautiful appearance. 5Direct Replacement: Easy to install and disassemble, you can directly replace the old or damaged parts to obtain higher strength.SpecificationItem Type:5355M15Timing Belt +13T8mm TimingPulleyMaterial: Rubber + SteelColor: As Pictures ShownWeight: Approx. 68g / 2.4ozTiming Belt Size:Circumference: Approx. 535mm / 21.1inWidth: Approx. 15mm / 0.6inPitch: Approx. 5mm / 0.2inNumber of Teeth: 107 TeethPulley Size:D Hole Diameter: Approx. 8mm / 0.3inPackage List1 xDriveBelt1 x Pulley