Moving while working enables children to alleviate anxiety, hyperactivity and boredom, they can enjoy bouncing their feet and feeling the tension to relieve their stress and increase their concentration. Chairs can be stacked and moved as normal. Easy to install no tools required. Safety tested and latex free. Anti-burst, slip-resistant high-quality material. The support pipes are 102mm long and 38 dia. The band stretches to fit chairs with legs 330-432mm apart. Not a toy – adult supervision required.