The Thunder Glow Illuminated Nocks for Crossbows 6 Pack in red is a high-quality product from NAP, designed specifically for crossbows. These lighted nocks are illuminated for easy target acquisition, even in low-light conditions. Manufactured in the United States, this pack includes 6 red nocks to ensure you have a spare on hand for your crossbow shooting needs. With free shipping included, this product offers convenience and accuracy for your archery practice.