This CDI box / igniter fits many models and makes of ATVs, dirt bikes, go karts, scooters and other motorized products. Most commonly used for the Jianshe JS250 and Baja Wilderness Trail 250 (WD250-U) ATV - Vin Prefix LLCL. Baja Part Number 250U-555. Also used on the Loncin WD250, Hensim 250 Utility, Yamoto 250 Utility and older, TaoTao 300cc engines, Roketa ATV-10(RTU-250Y),ATV-12(L6F),ATV-11(RTU-400Y). Case dimensions are L-7cm, W-4.6cm and W-2.5cm. CDI has one male 3 wire pug, one 2 wire female plug and one 2 wire male plug.