Glowstick 4 inches is a medium size breaklight (10 cm long) in several colors.
Because this glowstick is provided with a hook and eye it's just as suitable as a standard breaklight. When his big brother Breaklight 6 inches is too big and the Mini Breaklight is too small, this size is perfect. Just bend and shake, and it glows brightly for hours.
Ideal at parties, night golf, night fishing, hikes, camping, sporting events, etc.