Thermo Scientific Revco Dual Wheel Casters 6041 are the refrigerators and freezers accessories that make it easy to move your unit. These 2 inch casters are used with Thermo Scientific Revco general-purpose freezers and chromatography refrigerators. The set consists of 4 casters. For capacities 4.9, 11.5, 23.3, 29.2, 51.1, 78.8 cu. ft. units.