These are plastic rollers which can be used for the rear roller setup. Double rollers are suitable to setups for beginners in particular, as they are simple to fit, provide smooth, stable cornering, and help prevent your car from bouncing over the course wall thanks to the top rollers.

Features:

Rollers are molded in low-friction POM plastic (black).

Attachment of Item 94752 (520 ball bearings) and 94768 (Bearing Roller Spacer) provide more superior functionality.

13mm (top and bottom) Double Rollers x2

Screws and metal parts included.

Compatible with the MA, VZ, and AR chassis cars. Some bodies may require modification.