This pendulum ball set is an excellent instructive tool for demonstrating the and energy conservation. The excellent construction ensures accurate and consistent results, making it ideal for scientific demonstrations. It is a accessory that can be used in various physics experiments to enhance learning and comprehension. Features -Color:Multi -Material:Steel, plastic -Size:2.50X2.50X2.50cm/0.98X0.98X0.98in -Size:2.00X2.00X2.00cm/0.79X0.79X0.79in -Size:1.50X1.50X1.50cm/0.59X0.59X0.59in -Enhanced learning support: provides comprehensive assistance for physics mechanics teaching experiments, essential for effective learning. -Visual learning aid: the motion of the balls clearly illustrates key physics mechanics concepts, aiding student understanding and retention. -Robust and reliable: made from Excellent, materials, ensuring longterm use and stability. -Easy to transport: the ball set includes multiple balls, designed for convenient transport and storage, ideal for experiments. - usage: suitable for a wide range of instructive and research settings, meeting the needs of different physics mechanics experiments Package list: 3 x steel balls 2 x plastic balls