Hamilton® Duralast„¢ Wheel 8 x 3 - 1" Roller Bearing, Hamilton Casters, Mfr#: W-830-D-1

this wheel is liquid cast to a thickness of approximately 1/2" and chemically bonded onto heavy-duty iron wheel centers. The distinctive green treads are chemically inert, non-sparking, non-conductive, impervious to ozone, grease and most oil and solvents, and will not mark floors.