The CBS-ERK-20R is a caster base designed for use with ERK Series rack systems. The caster base features a skirt that hides the wheels, improving the overall aesthetic appearance of the rack. The caster base bolts to the bottom of the rack and adds 4in to the overall rack height. The skirted base not only looks good but also protects the caster area. Made of robust steel, the caster base is finished with a black powder coat that ensures it will withstand wear and tear. The caster base comes equipped with four 3in pre-installed non-locking fine floor swivel casters, which provide easy mobility for the rack.The CBS-ERK-20R is a caster base designed for use with ERK Series rack systems. The caster base features a skirt that hides the wheels, improving the overall aesthetic appearance of the rack. The caster base bolts to the bottom of the rack and adds 4in to the overall rack height. The skirted base not only looks good but also protects the caster area. Made of robust steel, the caster base is finished with a black powder coat that ensures it will withstand wear and tear. The caster base comes equipped with four 3in pre-installed non-locking fine floor swivel casters, which provide easy mobility for the rack.