cheap Kettlebell NamePu Competition Kettlebell MaterialPU+Steel FunctionBody ColorCustom PackPoly bag The competition kettlebells are all the same size, so you can use consistent techniques for training when lifting weights. These kettlebells have great stability. Develop strength individually or in pairs. Each weight is finished in a different color for quick and easy identification of the weight. All weights are of the same size and size, regardless of weight, the flat base of the kettlebell can be better controlled. Competitive kettlebells are the global standard for kettlebells. http://www.nantongsporting.com/kettlebell/