Specialized in the production of Pilates rings, offering high cost-performance, a wide range of colors, and the ability to accept custom orders in large quantities Material: Rubber PPEVA fiberglass Rich colors, novel designs: black, blue, pink, and purple are always in stock Specifications: Diameter 38cm, Thickness 3.0CM Packaging: Individual OPP packaging, individual carton packaging Number of items per box: 10 Weight: Net weight of each item is 300 grams, gross weight is 350 grams The official name of the Pilates magic ring should be "resistance ring."This flexible and convenient exercise aid was invented by Joseph Pilates himself.The earliest resistance ring was made of a piece of metal wrapped into a circle, with wooden handles on each side of the outer circle serving as grips. The joint of the metal piece was secured with screws to one of the handles.