The next generation of Lighted Nock is the Nockturnal Shift

• Super Strong Clear Polycarbonate Construction
• Waterproof and Shock Proof
• Weight: Approximately 25 grains
• Delivers more than 20 hours of lithium-powered battery life
• Quantity: 2-pack

Fits X, H, S, and GT Arrows:

• X (no collar) fits smaller diameter carbon .204 ID shafts
• H (white collar) fits carbon .233 ID shafts
• S (gray collar)  fits standard carbon .244 ID shafts
• GT (black collar) fits carbon .246 ID shafts