I found them online and they were manufactured by S&W Manufacturing. It is 39 inches long and about 3 inches wide and is made from some kind of plastic or nylon.
I found them on sale for $41 from Travers Tool Company called the S&W WALL MOUNTED THREAD CHECKER SWTC-WM1 and the shipping was about $10 UPS. http://www.travers.com/
This part is for checking bolts and the next part for checking nuts.
There is also a length ruler in metric and inches as well as a diameter checker for the screws and bolts that are like #6-32 (not shown in my pictures)