Description: Material: Plexiglass, plastic Bottom diameter: Approx 10cm / 3.9 inch Mirror diameter: Approx 10cm / 3.9 inch Focal length: -300mm Easy way to learn the reflection principles of optics Comes with durable plastic stand, can adjust the prism angle freely Essential equipment for nature science studying in kindergarten and primary school, and light reflection researching in high school Ideal for school classes teaching tool or as intellectual development toy for child Package Includes: 1 x Concave mirror 1 x Stand
