Show that you're loud and proud in your support for ALS awareness with these mylar boom sticks. They're a great way to get everyone's attention and encourage them to support a very important cause. Give them out at fundraisers or use them to cheer on benefit walkers and runners. After you inflate, seal the self-adhesive tab to keep the boom sticks from deflating. To achieve loudest noise, keep the boom sticks vertical when hitting them together. Mylar. (2 dozen per unit) Inflated, 23" x 4"; includes 4" blow stick.