Elevate your archery game with NAP Thunderglo lighted nocks. Engineered with ultra-bright LED lights, these nocks provide superior illumination, allowing you to track your arrows with ease, even in low-light environments. The intuitive on/off functionality makes them simple to activate and deactivate, while their polycarbonate and aluminum construction ensures they can withstand the rigors of the toughest hunts. Choose from blue, green, or red in either 3 or 6 packs, and with universal collars, the Thunderglo nocks are compatible with most arrow shafts (G/X/H/S). For reliability and performance that shines, trust NAP Thunderglo lighted nocks. 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