Wagon and other 68,000 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
There is a rectangular shape, and the top corners are rounded. There are four small squares with rounded corners evenly distributed near the top of the rectangle. On the bottom of the rectangle, there are four circles, two sets of two circles joined together by a line. Each set is on opposite ends of the rectangle.