4" Heavy Duty Caster Wheel - Brake Cast iron PU - Top Plate Mount4" Inch Caster Wheel 772 pounds Swivel and Upper Brake Cast iron polyurethane Top Plate VXB009100BCPUB Heavy Duty Wheel Diameter= 100mm Wheel Width= 50mm Wheel Diameter= 4" Inch = 100mm Overall Height= 124mm Overall Height Inch= 4. 882" Mounting Type= Top Plate Top Plate Size= 138mm x 110mm x 10mm Hole distance= 110mm x 75mm Wheel Core= Cast iron polyurethane Tire= Cast iron polyurethane Bearing type= Precision double ball bearing Load Capacity= 772