Tool Box Dolly Caster Bearing Type Ball Bearing Caster Brake Type Two Wheel Lock Caster Material Rubber Caster Tread Material Rubber Caster Type Solid Color Blue Compatible with Manufacturer Model No L-Boxx-1 L-Boxx-1A L-Boxx-2 L-Boxx-3 L-Boxx-3D L-Boxx-4 For Use With L-BOXX System Number of Casters 4 Overall Depth 26 in Overall Height 6 in Overall Width 20 in Platform Height 6 in Platform Length 26 in Platform Material Plastic Platform Width 20 in Stackable Yes