Students use Bouncy Bands for Desks to bounce their feet and stretch their legs to release their extra energy, anxiety, and frustration in class while they work quietly. The loops on the heavy-duty Bouncy Bands rest inside the groove at the top of each support pipes so it doesn't slide down to the floor when being used. Made in the USA. Latex-free. The heavy-duty Bouncy Band is 20" long and stretches to fit desks that are up to 25" wide. The support pipes are 8" tall and have an inside diameter of 1.5".