M12 FLYWHEEL NUT 150cc FOR SCOOTER WITH GY6 150cc MOTORS SERRATED BASE THREAD SIZE: M12X1.25 OVERALL OUTER DIAMETER: 22.5mm HEIGHT: 11mm *NUT COLOR MAY VARY* FITS MOST CHINESE 150cc SCOOTERS WITH GY6 MOTORS FITS TAOTAO, JMSTAR, ROKETA, SUNL, TANK, PEACE, JONWAY, GATOR AND MANY OTHERS