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EISCO Round Convex Glass Mirror - 4' (100mm) Diameter - 100mm Focal Length - 2.5mm Thick Approx.

4.7 (1) Write Review
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$16.69

$ 7 .99 $7.99

In Stock
  • This round convex glass mirror is designed for physics and educational uses.
  • It is approximately 4" (100mm) diameter and 2.5mm thick. Note, thickness varies as they are not designed to be consistent in that respect.
  • Because of their educational use design, there may be minor imperfections that do not affect physical function.
  • 100mm Focal Length
  • Bulk lens and mirror sets available upon request.


This round convex glass mirror is designed for physics and educational uses. It is approximately 4" (100mm) diameter and 2.5mm thick. Note, thickness varies as they are not designed to be consistent in that respect. Because of their educational use design, there may be minor imperfections that do not affect physical function. 100mm Focal Length Bulk lens and mirror sets available upon request. Round convex glass mirror designed for physics and educational uses.


Dennis A. Purcell
2025-02-12 19:22:29
The mirror arrived today - it is indeed optically accurate. However, dimensions/accurate information are lacking in the description. The mirror is 3-13/16" in diameter NOT 4" as advertised. Also, the back is not flat so how is one supposed to mount it? Yes, it may be 2.5 mm thick - I had assumed that was the dimension at the edge. 101.6 mm is 4" . . . this mirror is 76.2 mm!! Hopefully I will be able "to make it work" for my needs?!!