Exquisite Craftsmanship This well-made black wooden Newton's cradle features a sleek and generous design, nylon strings, and a stainless steel frame for durability and longevity. Each metal ball weighs 46g, ensuring a satisfying 15-second swing time. The heavier weight reduces friction between the balls, extending the swing duration. The total weight of the balls is approximately 260g. Easy Installation Simply place the frame into the hole in the wooden base – installation is complete! The finished product measures approximately 18 x 12 x 18 cm (L x W x H). Multifunctional Item The fun and engaging nature of Newton's cradle makes it a captivating gift for children. As a desk decoration, it can help relieve stress and provide a calming visual focus. No Tangled Strings Unlike competitors, our product is carefully packaged to prevent tangled strings upon arrival.