This physics mechanics experimental teaching instrument is convenient for conducting experiments and teaching. The instrument has a sturdy structure and a long life, making it suitable for long-term use. The operation steps are simple and easy to understand, making it suitable to conduct experiments. The clamp can adjust the angle, making it suitable for different experimental needs. The instrument has high precision and accuracy, meeting the requirements of teaching and scientific research. Features -Color:Multi -Material:iron -Size:14.00X7.00X1.70cm/5.50X2.75X0.67in -Size:29.00X8.00X1.00cm/11.40X3.14X0.39in -This is highly versatile and can be used for conducting a wide range of experiments as well as for teaching purposes. -The sturdy structure of this instrument ensures that it has a long life and can withstand frequent use. -The operation steps for this tool are simple and easy to understand. -The adjustable clamp angle feature allows for suit different experimental needs and requirements. -This instrument boasts high precision and accuracy, making it an ideal choice for both teaching and research. Package list: 3 x pulleys 3 x clamps 1 x roll of rope