Tool Box Dolly, Caster Bearing Type Steel Ball Bearing, Caster Brake Type Locking Casters, Caster Diameter 4 in, Caster Material Polymer, Caster Tread Material Neoprene, Caster Type Solid, Caster Width 1 in, Color Black, Compatible Modular System Packout, For Use With PACKOUT(TM) Series Modular Storage System, Handle Type No Handle, Includes (4) Wheels, Number of Casters 4, Overall Depth 18 7/8 in, Overall Height 13 1/4 in, Overall Width 24 3/8 in, Part of a Modular System Yes