This optical experiment equipment set is perfect for students and beginners who are interested in learning about physics and optics. This equipment set is durable and safe to use, making it suitable for use for science teaching, help to strengthen students' manual ability and improve their learning interest. Features -Color:Assorted Color -Material:ABS -Size:45.50X11.20X9.50cm/17.88X4.40X3.73in -This set of equipment is designed for students who are interested in learning about optics and physics. -The concave and convex imaging experiment allows students to explore the principles of image formation and the properties of concave and convex lenses. -The experimental equipment is specially designed for physics teaching, which helps students better grasp the optical knowledge. -The optical mounts are designed to securely hold the lenses in place, ensuring accurate and reliable results. -Good workmanship, the experiment tools are easy and portable to take, support long time using. Package list: 1 x light source base 1 x light source 1 x light screen(white) 1 x light screen(black with hole) 1 x convex lens 1 x concave lens 1 x light source rod