Start a ruckus in the stands at the next big game, concert, carnival, pep rally or fireworks display with these safe and unique noisemakers! Our namesake Bam Bams are 23.5"" x 4.25"" and made of durable polyethylene. Simply inflate and seal these colorful devices, then bang them together to create a steady roar that is sure to rile up your side and intimidate your opponents. Sold in pairs.