Glass Lenses Set of Six in Wooden Case - 50 mm Dia, 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL) - Eisco Labs auspowers_batchthree make sure you get the

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Glass Lenses Set of Six in Wooden Case - 50 mm Dia, 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL) - Eisco Labs auspowers_batchthree make sure you get theGlass Lenses Set of Six in Wooden Case 50 mm Dia, 3 Double Convex (20, 30, 50cm FL) and 3 Double Concave (20, 30, 50cm FL) Eisco Labs Optics Lens includes 6 lenses. All lenses have been ground, polished faces and ground edges. All lenses are 50mm. TypesOne of each: double convex, plano convex, converging concave convex, diverging concave convex, double concave, plano concave. Lenses are stored in wooden box with hinges and latch to keep lenses