Description: Material: The Pulley Experimental Equipment set is made of quality materials, great for making Science Project Experiment Teaching aids: The Pulley Block Physics Experiments Set can be used to demonstrate the principles of pulleys and how they work in real machinesEducational Tool: This is an essential physics experiment equipment for students and teachers, providing demonstrations in physics mechanicsWide Application:Educational Science Kits are Ideal for use at home, schools or labPackage Includes:Package includes double pulleys, single pulleys, long rope, short rope and four hooks Size Chart: Double pulley total length 12.5cm/4.92inch wheel 3cm/1.18inch;4cm/1.57inchSingle pulley total length 9cm/3.54inch wheel 4cm/1.57inchPulley line: long line:120cm/47.24inch; short line:60cm/23.62inch Package Includes: 1 set Pulley Block Physics Experiments