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3318G-1Glass Cylindrical Lenses Bi-Convex Power 14D (Focal Length ~72Mm)$323352A-06Lenses, Plano-Concave, Acrylic 60mmx15mm$7.60LDS1Lens Demonstration Set, Glass, 50 Mm Lens Set$25330575MM-300MMMade Of Polished Glass With Ground Edges. Bi-Concave Lens: Used For Reducing The Size Or Spreading Out Light, With Two Inward Curving Symmetrical Faces. &Nbsp;200 Mm Focal Length. &Nbsp;
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