With its high-capacity design, this Madico phenolic caster is ready for heavy-duty performance. The high-strength, high-impact phenolic wheel is non-conductive, spark-proof and resistant to gasoline, oil and dilute acids. The non-marking 1 3/4" (45 mm) tread and two independent rows of freely rolling hardened ball bearings ensure it operates smoothly over carpet, concrete, asphalt and wood planking. The carbon steel, heat-treated mounting plate is 3 15/16" x 4 1/2" (100 x 114 mm), making it easy to secure and install on flat surfaces. The caster is 7 5/16" (186 mm) in height, has a 6" (152 mm) wheel diameter and has a load capacity of 882 lbs (400 kg).