Demonstration Pulley Experiment Set This physics lab equipment includes 2 single pulleys and 2 double pulleys for mechanics experiments. Material The pulley block set is made of PP and metal materials, ensuring durability and long-term functionality. Sizes Single pulley measures 4 cm x 10 cm. Double pulleys have diameters of 4 cm and 3 cm, with a length of 13 cm. Educational Tool Essential physics experimental equipment for students and teachers. Ideal for teaching mechanical principles in physics. Can be used to demonstrate the function and application of pulleys in real-world systems. Wide Application Suitable for home, school, or laboratory use. A great educational gift for children in elementary and middle school. Encourages hands-on learning and exploration of basic physical science concepts through DIY experiments. Specification: Material: PP, Metal Size Chart: Single Pulleys: 4 cm x 10 cm (1.57 inch x 3.94 inch) Double Pulleys Diameters: 4 cm (1.57 inch), 3 cm (1.18 inch), Length: 13 cm (5.12 inch) Package Includes: 1 Pulley Block Physics Experiment Kit