ADJ FS-6C
The FS-6C from American DJ is a color-changing adapter to be used instead of separate color gels on ADJ Followspot systems. Compatible with FS-1000, FS-1000/AS, and FS-600/A (sold separately)
 
Details
Instead of using separate color gels to achieve the desired results, this adapter allows you to choose between red, blue, green, and yellow filters to achieve a variety of different color effects with your Followspot system. With a traditional gel system you would have to keep track of and remove/replace each gel every time you wanted to change the color of your spot light, but this adapter makes changing color gels a breeze when used with compatible American DJ Followspot systems.

The FS-6C is compatible with the following Followspot systems (sold separately): FS-1000, FS-1000/AS, and FS-600/A