Do you need portable and useful physical optical convex lens set? , take a quick look at this item. Made of glass materials, practical and excellent. Simple look design and craftsmanship ensure its popularity and practicality, excellent durability. Features - ColorWhite -Material:Glass - Size: 6.00X3.00X1.00cm/2.36X1.18X0.39in - Size: 4.00X3.50X1.00cm/1.57X1.38X0.39in - Size: 6.00X3.00X1.00cm/2.36X1.18X0.39in - Size: 6.00X1.00X0.50cm/2.36X0.39X0.20in - Size: 6.00X1.60X1.00cm/2.36X0.63X0.39in - Size: 6.00X1.30X1.00cm/2.36X0.51X0.39in -Diverse optical lens combinations, convenient and practical to use, catering to various experimental requirements. -Suitable for physics optics experiments, specifically designed for middle school scientific experiments, facilitating comprehensive understanding of optical principles. -Optical convex lens set is crafted from glass material, ensuring exceptional light transmission, excellent durability, simple to clean and easy for maintenance. -Exceptional precision, optical lens surfaces are meticulously processed to precise reflection and refraction of light. -Lightweight and portable, proper size, easy to use and store, can be used for school, laboratory, classroom. Package list: 1 x semicircular optical lens 1 x equilateral triangular optical lens 1 x rectangular optical lens 1 x concave convex lens 1 x cylindrical double convex lens 1 x cylindrical flat convex lens