[Product Type]: This is a lever principle teaching instrument, ideal for physics mechanics teaching and experiments.This lever principle teaching instrument serves as an educational tool for understanding the principles of leverage in physics. [Material]: The teaching instrument is made of ABS, ensuring durability and longevity. [Features]: The pulley block base ensures stability during use while the pulley system allows for a variety of mechanics based experiments, making it an essential tool for any science education setting. [Function]An essential physics experimental equipment for students and teachers, great for teaching mechanics effects in physics. Can be used to demonstrate the principle of pulleys and how they work in real machines. [Wide Application]Great for home, school or lab use. Also ideal Birthday and Christmas gift for kids, children in elementary and middle school, can enjoy DIY experiments fun while learning basic physical science knowledge. Colour:Yellow Material:ABS Package Contents: 1 x Pulley Block Physics Experiments Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.