This is a learning tool designed to help students understand the principle of light refraction in an intuitive way. It supports physics education by enhancing students' comprehension of optical concepts and serves as a useful aid for classroom instruction. Features - Color: Silver - Material: Glass - Size: 6.00 x 3.00 x 1.00 cm / 2.36 x 1.18 x 0.39 in - Includes: Cylindrical convex lens, semicircular lens, rectangular lens, concave convex lens - Made of glass, durable, and easy to clean - Visually demonstrates the refractive index of light through glass - Helps illustrate the principles of refraction for better student understanding - Ideal for scientific experiments and classroom demonstrations Package List: 1 x Set of 4 pcs Optical Lenses