PATIKIL 0.8" 1" (200mm 300mm) Focal Length Double Convex and Concave Lens Set, Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear

PATIKIL 0.8" 1" (200mm 300mm) Focal Length Double Convex and Concave Lens Set, Glass Optically Polished Round Edges Lens for Physics Experiment Classroom, Clear

PATIKIL 4" (100mm) Focal Length Double Convex Lens, 2 Pack 40mm Diameter 6mm Height Glass Optically Polished Round Edges Lens for Physics Experiment, Clear

PATIKIL 4" (100mm) Focal Length Double Convex Lens, 2 Pack 50mm Diameter 9mm Height Glass Optically Polished Round Edges Lens for Physics Experiment, Clear