Specifications

Specification:

Made from rubber material, high quality;

Weight: 2lbs.

Features:

Non-slip surface make it easy to carry;

With bounce ability ideal for body building;

Different weight for people of different heights;

Usual weights: 2lbs, 4lbs, 6lbs, 8lbs, 10lbs etc;  

Grreat for upper body strengthening;

Exceptional abdominal exercise tool to improve strength in abs, arms, and obliques;

Also popular with professional athletics, boxers, golf and tennis players.