They're Hi-Mount Stabilizers helpful for Mini 4WD cars. This variation will be as Limited-Edition yellowish color to include a splash of accent color towards automobiles color theme. • Hi-Mount Tube Stabilizers x3 • Stabilizers are for accessory to front rollers. They assist balance the car if it loses form during a corner. • Stabilizer measurements: 8mm diameter, 10mm tall. • Parts are molded in clear yellowish synthetic. • minimal parts for attachment included. • suitable for Mini 4WD & Mini 4WD PRO cars.