Caster Concepts in Albion, Michigan, offers the most durable cast iron casters that are made from class 30 gray iron. Class 30 gray iron provides the maximum load capacity, and impact strength for the cast iron wheels, which is vital. Cast iron wheels are also valuable in the sense that they can withstand extreme heat and still remain strong. These cast iron wheels are good for indoor and outdoor situations that may be encountered.
When searching for a caster wheel, most would like to choose the most durable option. Cast iron caster wheels fulfill this preference.
Update:: Visit Caster Concepts at their booth at ProMat 2015, McCormick Center in Chicago, March 23-26, 2015.