Hard Rubber Wheels Products DescriptionDC CASTERS Hard rubber wheels loading capacity is from 300KGS to 400KGS. DC CASTER has improved the traditional rubber making processing according its rich experience of manufacturing Rubber Wheels. The update technology makes rubber close connect with Plastic Core or Iron Core,Website: ,which is not easy break. The Rubber is much elastic and long life utilization.Steel Grade: S235JR Or S275JRSurface treatment: Plate Zinc and Spray PlasticsSteel Thickness:6mmInstallation Diagrams:115mmx100mmBearing: Roller Bearing Or Double BearingWHEEL Materials: Korean RubberMode: Rigid, Swivel, BrakeSpecification:Wheel MaterialsWheel Dia.(Inch)Wheel Width(MM)Overall Height(MM)BearingLoading Capacity(KGS)Korean Rubber4"50137Double Bearing300Korean Rubber5"50158Roller Bearing320Korean Rubber6"50186Roller Bearing350Korean Rubber8"50230Roller Bearing400