GOOFIT 28mm Magneto Flywheel Puller for 4-Stroke 70cc 90cc ATV Scooter Magneto Puller for 4-stroke Motorcycle Inner Diameter of magneto flywheel puller: 28mm. We measure the size of the thread inside. Pls check it clearly(As the photo) One week money back guarantee if not satisfied Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)