This 4" x 2" solid nylon premium heavy duty swivel caster features a high impact polymer wheel, making it excellent for heavy-duty, abusive applications. Solid nylon wheels are resistant to most chemicals and corrosion.Our 44 Series casters are our most popular 2-inch wide industrial mobility solution. 44 Series caster rigs are manufactured in the United States, for expedited shipping and increased quality assurance. Many wheel options are also made in the US. Zinc plating provides an attractive finish which increases corrosion resistance and provides longer caster life.