GOOFIT 44mm Big Bore Cylinder Top End Kit for 2 Stroke 47cc 49cc Mini Quad Pocket Bike Chain Saw Cylinder piston kit for 2 stroke 47cc 49cc ATV Pocket Bike cylinder diameter: 44mm,piston pin diameter :12mm This item include cylinder head, gasket,L7T spark plug, ignition coil,wrist pin,clips and piston Arrival within 1-2 days (Sold by GOOFIT and Fulfilled by Amazon) Arrival within 7-15 days (Ships from and sold by GOOFIT)