Tamiya Mini 4wd 94305 HG Carbon Multi Roller Setting Stay (1.5mm SIlver)
From the Tamiya website:
This 1.5mm thickness carbon stay allows attachment of 9mm, 13mm and 19mm rollers in a wide position. Carbon stays are more rigid than FRP counterparts; not only that, but these parts feature the carbon fiber pattern in silver for a stunning look. Do not use cleaners as they will damage the printed area.
Compatible Chassis: Mini 4WD and Mini 4WD PRO cars (some bodies/chassis may require modification.)