Nockturnal-X Lighted Nocks for Arrows with .204 Inside Diameter Including various Gold Tip Kinetic, Easton, Trophy Ridge, and Carbon Impact Brands FITS ARROWS WITH INSIDE DIAMETER .204 - Including Gold Tip Kinetic, Easton Axis/FMJ, Trophy Ridge, Carbon Impact HOT, and Easton ACC with X-UNI Bushing HIGH VISIBILITY and LONG LASTING LITHIUM BATTERIES - Shoot it at dusk, and with 20+ hours of battery life, you can still find your arrow the next day RELIABLE - Piston driven contact switch ensures L.E.D. illumination every time. Waterproof and shock resistant design is second to none 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 THREE PACK GREEN NOCKS - Also Available in Red, Pink and Blue