Bando Brand CVT Drive Belt size 788-18.1-28 for 50cc Piaggio Long Case Engines. fits the following:Aprilia SR50 Di-Tech LC (2003-13) Aprilia SR50 R Factory Di-Tech LC (2003-13)Gilera Runner 50 Purejet (2005+)Piaggio NRG 50 Purejet LC (2005+) Length: 788mmTop Width: 18.1mm Groove Angle: 28° Made in Japan