Main Jets kit for the Honda Ruckus NPS50 and Honda Metropolitan CHF50.  All sizes you need to properly tune your carburetor.
 
Includes sizes:
70, 72, 75, 78, 80, 82, 85, 88, 90, 100 
 
These are good for when you delete the stock air box which will require upjetting your carburetor to compensate for the increased air flow.  Will only fit Honda Ruckus NPS50 and Metropolitan CHF50 carbs.  Performance gains not guaranteed.