Nocks Fits for crossbow bolt size 0.300"(7.62mm) ID NO ASSEMBLY REQUIRED - Nocks can go straight form the package to the shaft in fully operational condition. No prep work needed. Just insert it, and you are ready to shoot High visibility - maximum light transmission,easy to find your arrow even at night or dawn Long Battery Life--48+ hours of battery life,long lasting but light weight Weight: 25grain/pcs
