Nockturnal lighted nock universal fit orange 3/pack FEATURES:-Super strong clear polycarbonate construction-Fits X, H, S & GT Arrows-20+ Hour battery life-3/pack Other Features: Piston driven string activated linear contact switch ensures led illumination every time,20 hour+ battery life,water and weather proof nocks can go straight from package to the shaft in fully operational condition-no prep work,universal sleeves will fit x,h,s,& gt arrows