【REPLACEMENT FOR】50cc 70cc 90cc 110cc 125cc 150cc 200cc 250cc ATV 4 Wheeler Quad Scooter Pit Dirt Bike Moped;【SIZE】Thread Hole: 10mm/0.39"; (as picture shows)【EASY TO INSTALL】Excellent quality, 360° flexible adjustment, STURDY, minimal vibration in motion improving operational SAFETY.Can improve your awareness and superb vision due to of its lying down function and use this product to see the condition of the vehicle behind you to eliminate blind spots;【NOTE】 Please check the model number and size before ordering to make sure it is suitable. the right part for your engine.