Light up your hunt with NAP Thunderglo lighted nocks. Featuring ultra-bright LED illumination, these nocks are designed for maximum visibility, making your shots easier to track in any lighting condition. With a simple on/off feature, they offer convenient operation at the touch of a button. Crafted from a rugged polycarbonate blend and an aluminum shaft, Thunderglo lighted nocks are built for exceptional durability, ensuring long-lasting use and reliability. Available in blue, green, or red, they come in 3 or 6 packs, and the universal collars ensure compatibility with most arrow types (G/X/H/S). For unbeatable performance and durability, trust the NAP Thunderglo lighted nocks to light your way. Nock made from a polycarbonate blend paired with an aluminum shaft Intense LED lighting Automatically activates upon release of the nock The LED remains illuminated until the user releases the nock Universal collars are compatible with Arrow Shafts in sizes G, X, H, and S