Here's something mildly interesting: a wheel without an advertisement. Evidently, you'd purchase a case of these wheels and stamp or affix your business information to it. What could be simpler? Why don't more businesses do this? What is WRONG with people?
This card measures 5.25 by 3.375 inches. There is no writing on the back. This is a really simple wheel. It would be fun to make one. I wouldn't choose such an ugly combination of colors, though.