This is the 78197 License Plate Kit for the in bed poly spreaders. It probably would work on many spreaders, but it was made for the Western Tornado, Fisher Poly Caster and Blizzard Ice Chaser.
If you have your spreader in a pickup, the chute will most likely cover the license plate making it impossible to see. If this is your case, do not leave without getting this kit first. To keep your vehicle legal, you will have to get this License Plate Kit to move your plate to the back of your spreader.
This may not be an issue with a larger truck where the plate is off to the side.
This kit provides convenient mounting methods and lighting in a high impact plastic casing.
You can find the parts list and installation instructions for a stainless steel hopper spreader at this link.
