The Nockturnal Launchpad Crossbow Nocks are designed for high-performance and reliability. These green-colored nocks are built with durable materials, ensuring they withstand the rigors of crossbow flight. The integrated aluminum housing protects the battery and LED, while the micro-adjustable barrel end provides a secure fit. This product is suitable for nearly all crossbolt brands and models, making it a versatile option. The reusable C-clip prevents accidental lighting during storage. Fast shipping ensures you can get your hands on these nocks quickly. Each nock weighs approximately 30 grains.Key Benefits and Features: Weight: 30 grains Color: Green Number of Pieces: 3 UPC: 818322016049