f2c 10 lbs medicine ball workout med ball for core strength, balance, coordination exercise non-slip rubber shell textured surface f2c <b>specifications:</b><br> color: black + blue<br> material: rubber<br> product diameter: sφ9.41” / 23.9cm<br> net weight: 10 lbs<br><br> <b>package includes:</b><br> 1 x 10lb medicine ball