This is a clockwork movement, mainly made of sturdy and durable material. This clockwork movement is safe to use and easy to operate. Can provide your DIY craft with better working performance. This clockwork movement is made with craftsmanship and will serve you well. Features -Color: black, light grey -Material: plastic -Size:4.50X4.50X3.50cm/1.77X1.77X1.38in - Just need to manually rotate the clockwork, and then release, the toy will move after you twisting it. - Adoption of reusable plastic material, the movement can be used for a long time. - With the compact clockwise movement, you can create your own moveable toy. It will bring you of fun, and practice your hands on ability. - If you want to keep cranking, then this windup movement can make you happy and have a DIY process! - And this clockwork movement is also a precious and meaningful gift for yourself and your close friends. Package list: 10 x Movements