The UFO .244 S Series Red Lighted Nocks feature advanced LED technology designed for .244 diameter arrow shafts. These premium archery nocks provide enhanced arrow tracking and retrieval capabilities.UFO .244 S Series Red Lighted Nocks - 3 Pack.244 diameter compatibility for precise arrow shaft fitLED lighting system for improved arrow visibility and trackingRed colored illumination for easy identificationCompact dimensions: 0.55 X 4.15 X 5.45 inches (package)Durable construction for reliable performanceIdeal for bowhunters and target archers seeking enhanced arrow recovery and flight tracking capabilities especially in low-light conditions or dense terrain.