High-quality: Rubber drive belt made of excellent quality rubber material, provide you high mileage and reliable performance Compatibility: V-Belt fit for most 50cc-80cc scooters with short case motor with 10inch rear wheel, reference for GY6, QMB/QMA 139, 4 stroke engines. Durable: This drive belts deliver superior strength, enhanced dimensional integrity and stability for long lasting belt performance. Dimension: Length: 669mm Width: 18mm Teeth Angel: 30 degree, a great replacement drive belt for the old or worn one. Easy to install: The belt is very convenient to install, professional installation is recommended. 100% Satisfaction Guarantee for every customer,any question pls feel free to contact us Features: Made of excellent quality rubber material, sturdy and durable. Oil and heat resistant, high mileage and reliable performance. According to factory specifications, a great replacement belt for the old or worn one. Easy to install, professional installation is recommended. Fitmen