Crafted from premium alloy and precision CNC machining, with high-quality R188 steel bearings, this 1.57-inch dynamic tabletop fits easily in your pocket or bag, weighing only 2.5 ounces. Enjoy dynamic fidgets anytime, anywhere.Experience simple yet captivating play by placing the ball on any flat surface and gently giving it a spin. Watch as the optical illusion ball creates a mesmerizing spiral, spinning for 180-300 seconds.