It is imperative for casters to be strong, reliable and durable, since they are a very important component of manufacturing and distributing. Caster Concepts understands the importance of longevity in casters, which is why their cast iron casters are made from Class 30 gray iron. Casters are also available in different materials to ensure you get exactly the type of wheel that you require. Cast iron casters are built for heavy-duty industrial use, and are meant for high capacity applications. These casters can withstand extreme heat while keeping their strength and are resistant to harsh environment abrasion. Cast iron casters are great for rough or dangerous surfaces, indoors and outdoors, and can be created based on individual specifications. Each wheel is precision machined with rounded edges to finished tolerances. Cast iron casters, as well as all Caster Concepts casters, are 100% domestic made in the United States to ensure quality.