The CBS-MRK-31 is a caster base designed for use with 31in deep MRK Series racks. The caster base is designed to fit inside the rack and only increases the overall rack height by 1in, ensuring that the rack remains stable. The caster base features an inner design that keeps the rack low and stable while still allowing for easy mobility. The Middle Atlantic CBS-MRK-31 works with LF leveling feet to secure the rack in place when needed. 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 commercial grade swivel casters, which provide easy mobility for the rack while keeping it stable.The CBS-MRK-31 is a caster base designed for use with 31in deep MRK Series racks. The caster base is designed to fit inside the rack and only increases the overall rack height by 1in, ensuring that the rack remains stable. The caster base features an inner design that keeps the rack low and stable while still allowing for easy mobility. The Middle Atlantic CBS-MRK-31 works with LF leveling feet to secure the rack in place when needed. 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 commercial grade swivel casters, which provide easy mobility for the rack while keeping it stable.