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 thats easy-to activate with multicolored options that lasts 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.