These are Scale Locators for the SkyRC Scales.  These Locators will make sure you have the same exact location of each tire for a consistant and accurate reading.  When moving your cars slightly on the scales, it throws your numbers off and these locators will fix that problem.  One for each Scale comes in a pack.  These come in a variety of colors.
 
These are for 1/10th Scale Foam Pan Car.
 
These are designed for Scale Bases of 1.98"x2.22" or 50.3mm x 56.3mm.
 
NOTE:  3D PRINTED PRODUCTS MAY NEED TO BE PRINTED AND MAY TAKE A FEW DAYS TO SHIP.