Sold individually. Order the quantity of wheels you need. 50002$190.00 Dynamic Beach Wheel Upgrade kit for Seitech Dollies including AxlesIncludes both wheels and axles. All you need for 1 sling style Seitech Dolly. 50013$400.00 We list our current available inventory in our shopping cart. WE SHIP WORLDWIDE! Due to the wide variety of the size and weight of our items we will charge the actual cost of shipping in a separate charge on all orders.You may email us for a shipping cost estimate. Send us email intensitysails(at sign)gmail.com MINIMUM ORDER IS US$10