Convex Mirror, 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, Optically worked, silvered back with protective coating, Size: 1.5in diameter, 150mm Focal Length
Exo Terra Cricket Pen Replacement Foam, insert for the water dish supplied with the Exo Terra Cricket Pen. The water dish foam insert prevents the crickets held in the Cricket Pen from drowning. Replace the foam in
Equilateral Prism, Material: acrylic, Refractive index close to optical glass, can produce a rainbow from a non-monochromatic light source such as sun light, Perfect for student use, which will not break or chip like glass, is a softer material, Size: 25mm length, 25mm face size
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