This optional heavy-duty caster support reduces the load bearing requirements of the wall by supporting the center section weight when opened and closed (typically used on 61" panel space models). Cabinet must be mounted 6" from the ground. Support is constructed of formed, 14-ga. CRS and includes heavy-duty, zinc-plated caster with a black, hard-tread wheel. The caster adjusts in height from 5 1/2" to 7 1/2" and is supplied with drilling template for easy installation. Finished in black (Note: before installing the CT31A, the center section guide plate must be removed) (Only one CT31A required per cabinet).