The UFO RED .246 GT Series Lighted Arrow Nock provides enhanced arrow visibility and tracking with built-in LED illumination in a vibrant red color.UFO RED .246 GT Series Lighted Nock - Model 3PK30-06.246 caliber specification for precise arrow compatibilityGT Series design for reliable performanceLED illumination for enhanced arrow trackingCompact dimensions: 0.50 x 4.25 x 5.45 inchesIdeal for bowhunters and target archers who need reliable arrow tracking in low-light conditions or for easy arrow retrieval after shooting.