Description: Through the disassembly of parts can enhance children's hands-on ability, guide children to love science. It also allows children to understand the abstract knowledge of physics. The use of environmentally friendly materials, the use of safe and healthy. No doubt, our product has high level of safety because it has smooth edge and smooth, which can protect your kids from being scratched. It also can stimulate children's interest in learning and curiosity, exercise the child's thinking skills. It is made from metal and plastic, is durable to use. The length of the stand is 36 cm. This product is suitable for education. Item Name: Physical Equipment Set Material: Plastic,Metal Features: Practical Ability, Sturdy, Hands-on Activities Tip: This set does not include the bar dynamometer and hook code, need to buy separately. Size Details: Stand: 36cm/14.17"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Stand 2 x Single Skate 2 x Double Skate 1 x 120cm Line 1 x 60cm Line