... .250-350kgs *wheel width at 50mm H4 Heavy duty type double ball bearing swivel caster wheel Heavy Duty Caster /Four Size available (4'',5 ... finishing available .6.Caster wheel can be changed to Pvc,rubber ,nylon ,pp ,tpr ,cast iron,high-heat resistant material ,conductive ... on pp[Similar Products][Productio Technique Chart] [Factory Display] H4 Heavy duty type double ball bearing swivel caster wheel