Manufactured with good workmanship, this optical equipment set is designed to be durable and , making it a great choice for students. The equipment is easy to carry and can be used for teaching, learning, and presentations, making it a versatile tool for educators and students alike. Features -Color:Assorted Color -Material:ABS -Size:45.50X11.20X9.50cm/17.88X4.40X3.73in -The light source provides a bright and consistent light source for the experiments, easy for students to observe and analyze the images formed. -This set of equipment adopts workmanship, ensuring durability and longevity. -Easy to set up and use, making the optical instrument tools a great addition to any classroom or laboratory. -Students can develop a deeper understanding of optics and physics, and cultivate their interest in science. -This set of equipment is a valuable addition to any classroom or laboratory, providing students with a better way to learn about optics and physics. Package list: 2 x light source x light source 2 x light screen(white) 2 x light screen(black with hole) 2 x convex lens 2 x concave lens 2 x light source rod