Gymnastic rings with adjustable straps Gymnastic rings with adjustable straps are made of high quality wood or pvc depending of your choice. It's perfect to all cross-fit and fitness training at home on a pull up rack. The strap is made of robust nylon, 15' long and can support up to 880lbs! Don't forget magnesium powder. Detailed specifications of the gymnastic rings with adjustable straps Length of 15' x 1.5" width Choice of wooden or PVC rings Straps are numbered Very easy to use Matériel: Bois, Plastique