Enjoy golf hours past sundown! This breakthrough technology has revolutionized the Golf industry. Neutron Twilight provides the high performance aerodynamics, control, accuracy, feel and distance you expect from a professional quality ball. 3 balls per pack. Performance: Remains active for 5 minutes upon impact Flashes brightly upon impact Official weight, size, symmetry, velocity, and distance standards Ball Design: Number of layers: 2 Cover thickness: 0.08 inches Compression ratio: 80-85 Weight: 1.53 oz. Circumference of Ball: ...