Fits: General Foam, Empire, Union, TPI & Grand Venture
This backplate was designed that we believe will improve the ease of lighting your favorite blow molds.  The center is also a knock-out that allows you to use a C7 Clip light cord.
 
The plate fits two different screws patterns: 3-1/4" spread & 2-15/16" spread. 
"spread" refers to the distance between two screws which is measured from the middle of one screw hole to the middle of the opposing screw hole.