If you want to do some pull-ups and other physical fitness, it is definitely the best choice! 

Features: 
Natural soft wood material, comfortable and anti-slip. 
Unbreakable construction. 
Wide black straps and firm buckles. 
It can be used as medical rehabilitation and cervical spondylosis rehabilitation. 

Specifications: 
Material: Wood 
Ring Diameter: 18cm / 7.09in 
Ring Thickness: 28mm / 1.10in 
Strap Length(Approx.): 4m / 13.12ft 
Package Size: 23.5 * 23.5 * 6.5cm / 9.25 * 9.25 * 2.56in 
Package Weight: 1374g / 3.03lb 

Package List: 
2 * Gymnastics Rings