The ORIGINAL Bouncyband for Desks increases focus and academic performance by giving children an outlet for excess energy while working. Moving while at work enables kids to alleviate anxiety, hyperactivity and boredom and children enjoy bouncing their feet and feeling the tension to relieve their stress and increase their concentration. In fact, an independent Clemson University study concluded that students stay on task 10% longer using Bouncybands! The patented support pipes on the Bouncyband prevent it from slipping down the chair legs onto the floor and teachers love how Bouncybands are quiet and don't disturb or distract other students. Bouncybands are easy to install (no tools required) and once installed, chairs can be stacked and moved as normal. The band stretches to fit chairs with desks with legs 20"-28" apart and the support pipes are 8" long and 1.5" in diameter.