Product description:
-- Main nozzle set for tuning the carburettor. We deliver 15 main nozzles in a set. Suitable for many models with 4-stroke GY6 engine. / Engine type 139QMA/ 139QMB & GY6.
Note:
Please make sure that the carburettor has M4 nozzles installed before purchasing. These nozzles may only be used with the above carburettors.