The Sabre Youth Arrow is a .600 spine arrow shaft designed for bows up to 40 lbs. Its unique glow zone is a waterproof non toxic lighted arrow shaft that's easy-to activate with multicolored options that last's up to 12+ hours. 5 glowsticks each a different color come with each 3pk of arrows. The shaft is precut at 28″ and includes a weighted target point glued in for proper “front of center” balance and increased performance.