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2-Pack Large Fresnel Lenses Φ300mm(11.81") Focal Length 120mm Acrylic Magnifier for Solar Heating,Solar Cooking,Visual Education. (Focal Length 120mm)
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2-Pack Large Fresnel Lenses Φ300mm(11.81") Focal Length 360mm Acrylic Magnifier for Solar Heating,Solar Cooking,Visual Education. (Focal Length 360mm)
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