United Scientific DEMO50 Glass Demonstration Lens Set, 6 Pieces, 50mm Diameter auspowers_batchsix Understand how to use electrical

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United Scientific DEMO50 Glass Demonstration Lens Set, 6 Pieces, 50mm Diameter auspowers_batchsix Understand how to use electricalUnited Scientific DEMO50 Glass Demonstration Lens Set, 6 Pieces, 50mm Diameter The set contains 6 lenses, one each of double convex, plano convex, concavo convex, double concave, plano concave, and convexo concave lens. Comes in a reusable cardboard storage box. Product Features Each lens measures 50mm in diameter All lenses have a focal length of approximately 150mm Lenses have ground glass edges Included lenses: double convex concave, plano convex