★These lightweight and rigid aluminum rollers have a stylish aero spoke design. ★Built-in ball bearings ensure smooth rotation, and plastic rings help maintain your model’s speed. ★Some bodies may require modification.

This motor case can store up to eight motors, regardless of their shape, single-shaft or double-shaft. It comes with a guide to hold the motors in place, so they won't collide with each other while being carried. The case body and lid are clear, and the lid has motor illustrations and text printed in black. There are also two spaces to store pinion gears.