Durability: The physics experiment pulley set is made of metal and is designed for repeated use in a classroom or environment. This sturdy construction ensures the life and durability of the product Size: The pulley system physics experiment size is 15cmx9.5cm for the base and 33.5CM for the height Features: The pulley block bases ensures stability during use, while the pulley system allows for a variety of mechanics based experiment, making it an essential tool in any scientific education environment Function: This is a necessary physics experiment equipment for students and teachers, great for demonstrating the principles of physical mechanics Wide Application:Educational science experiment is ideal for home, school or use. It is also an ideal birthday gift for primary and secondary school children Specification: Material: Metal Size Chart: Base: 15cmx9.5cm/5.91inchx3.74inch Height: 33.5cm/13.19inch Package Includes: 1 Pulley Block Physics Experiments Kits Note: Please allow slightly errors 1-2cm differences due to manual measurement. Note: 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.