Ring frames are used to vulcanize rubber mold discs for centrifugal casting (spin casting). Each ring frame set is composed of a machined steel ring and two 6061 aluminum plates. They are listed below according to their mold capacities. When used together with one or more shimplates, you can achieve multiple thickness capacities (see related products below). Non-listed sizes are available by special order. Made in USA by The Contenti Company.