Lumenok lighted nock x-series green 3pk FEATURES:-Activated upon the shot to allow archers to follow the path of their arrow-Provides up to 40 hours of illumination & can be seen from great distances-No magnet required for activation-Replaceable battery-Lumenok X Fits-Green Light-24.5 grains-3/pack Other Features: Simple preperation of arrow shaft prior to installation will insure trouble free operation,aids in tuning,stays lit up to 40 hours uses bohning a nock.Fits beman -ics mfx series.Easton-axis, full metal jacket,acc pro hunter.Gold tip-kinetic pro,xt ,& hunter