180 days warranty and 100% money back guarantee if not satisfied.Quality made for high mileage and reliability. Save time and money, go for quality. Oil and heat resistant BELT SIZE: 669 x 18 x 30 Product Description 669-18-30 CVT drive-belt for 49/50cc 4-stroke scooters commonly found with the QMB139 engine. BELT SIZE: 669 mm Length x 18 mm Width x 30 mm teeth spacing Please make sure this is the right size for your system. Package includes: 1 X Belt About Parts Quality and After-sale Services: To guarantee 100% customers’ satisfaction, we accept unconditional return service and 180 days warranty for all parts. Please contact with us if there’s any quality or other problem.We promise that you will never lose even one buck with our assistance.