Carbon Express LAUNCHPAD Crossbolt Lighted Nock, Size B (Fits 0.296" to 0.300" Carbon Crossbolts), 3-Pack, Red Size B lighted nocks are adjustable and offer easy installation for Beman (0.296"), Victory (0.300"), Ten Point (0.297") and Gold Tip (0.299") Integrated aluminum housing protects battery and LED during high-speed flight and impact Reusable spacer tab prevents unintended lighting while in the field or traveling Lightweight and precision-balanced for superior accuracy Indexed nock end provides added safety and an easy ON/OFF design