The FM300 comes as standard with a non skid surface, which is priced below. For the light or dark cherry rollerball version.
The FM300B, with it’s ball bearing rollers, encourage gentle rocking of the feet in the same way a rocking chair encourages movement. This rocking motion uses most of the lower leg muscles to increase healthful circulation. In addition, the FM300b offers a 3″ height adjustment for custom positioning.