Roll a resistance tubing activity and roll a rep! Everything you need for a group of up to 6 people is here: 6 resistance tubes (1 X-Light, 2 Light, 2 Medium and 1 Heavy), an exercise instruction card plus our new 16" inflatable Exerball™! Our exercise ball contains two 3" dice: one depicting 6 resistance tubing exercises, the other indicating the number of repetitions. Just toss it and the dice instructs your group on what to do! Users select the appropriate resistance tubing to match their strength level.