Faithful reproductions of Joseph Pilates Magic Circles and Flex Ring DVD. This Pilates ring is made from tempered spring steel with padded wooden handles. The greater the number of bands, the stronger the resistance. Medium 3 band resistance is recommended for most exercisers. Heavy 4 band resistance is suggested only for those who are already very strong. Light 2 band resistance is appropriate for those who are just beginning a conditioning programme after being inactive for a considerable time. 16.5 in. (42cm) diameter.