The World Industries Stacked Logo Wheels are a 4-pack of skull team wheels available in multiple sizes. World Industry wheels are poured- not injection molded, and are made with a high rebound, high quality urethane compound. All World Industries wheels’ riding surfaces are machine lathed for true uniformity. Graphics at one side. Available in colorways as seen below. Colors are limited to specific size. See colors below for correlating size. Sizes available as seen below. Wheels sold in set of four.