Everyone loves "glow" products -- and what better way to keep the entertainment going throughout the night than with safe, non-toxic and easy-to-use glow sticks! Each standard glow stick measures 7.5mm x 75mm (3" in length) and glows for approximately 6-8 hours. All glow sticks are waterproof. And the refill bricks are ideal for use with all Lumi-Niter products. You can mix and match colors to create your favorite glowing, color patterns to illuminate the sky. Show your team spirit, tout your favorite colors, and enjoy continued glowing fun from dusk till dawn.