Specifications: The unique nature of the rings gives all of the exercises a fun, athletic feel. Nearly every exercise is more challenging when done on the rings. Accessible for beginners, with gentle progressions towards harder skills. Because ring training activates so many muscles in such a coordinated way, it"s also an effective adjunct to some forms of physical therapy. Description:Nylon Webbing Straps (W x L): 2.5cm(0.98in) X 460cm(15FT) Anti-skidding designPipe Diameter of the Ring: 3cm(1.18in) External Diameter of the Ring: 23cm(9.06in) Maximum Load: 200kgColor: BlackRing Material: PlasticHow to Use: Hang it directly onto the beam, horizontal bar, or big branches, or fix it by expansion hook bolt Show as the picture Package Includes:2x gymnastic rings2x high-strength nylon webbing straps with quick-lock buckles