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Duralast - the protective wheel that wears like steel - 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 oils & solvents, and will not mark floors. Duralast Wheels are also guaranteed against tread separation for one year in ordinary free-wheeling applications (contact factory for excepted applications).
. This wheel includes a Sealed Precision Ball Bearing with a caster hub length of 2-1/2".