Double Convex round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, for educational uses, Size: 100mm focal length, 2in diameter and 8mm thick
Double Concave Optical round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, Size: 250mm focal length, 50mm diameter and 3mm thick
Double Concave Optical round Lens, Material: Glass, designed for physics and educational uses, Because of their educational use design, there may be minor imperfections that do not affect physical function, Size: 150mm focal length, 50mm diameter and 5.5mm thick
Equilateral Prism, Material: optical glass, Perfect for optical refraction experimentation, Will create a rainbow with any standard light source (led from a phone will work), Because of their educational use design, do not affect physical function, Size: 75mm lengthx25mm face size