This experimental coil kit is designed for students, perfect training tools for class, help teachers/parents who wants their kids learn more about physics. Great for homeschooling, physics teaching, and in classroom demonstrations. Features - Color: Random Color. - Material: Plastic. - Size: Approx. 7.50X7.50X1.50cm / 2.95X2.95X0.59inch. - Made of plastic material and fine craftsmanship, durable and sturdy for a long time. - Stimulate students' interest, improve analysis and manipulative skills. - It help to better demonstrate the electromagnetism effect, a great tool. - Can be widely used in classroom teaching, school, home, labs, etc. - It can be used for student teaching, homeschooling, classroom presentations, etc. Package list: 2 Sets x Coils