metal, this set of electromagnetic dotting timer ensures long lasting use and results in physics experiments. Take your physics experiments to the next with this versatile electromagnetic dotting timer set, offering precise timing, easy data and efficient data management. Designed for physics students, laboratory technicians, and anyone conducting physics experiments, this timer set provides a way to accurately measure time and record data. This electromagnetic dotting timer set includes carbonless paper and a clip, allowing for precise timing and easy of experimental data in physics. Suitable for educational institutions, universities, and laboratories, this electromagnetic dotting timer set is for conducting physics experiments and analyzing the collected data.