2pc 50x50mm Optical Linear Fresnel Lens Focal Length 40mm 150mm Solar Condensor

2PC 50x50mm Optical Focal Length 70mm PMMA Plastic Fresnel Solar Condensing Lens

50X50mm Optical PMMA Plane Fresnel Lens Solar Condensor Focal Length 50mm 2PC

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Optical PMMA Plastic Linear Fresnel Lens Solar Energy Concentrator Condensor

125mm/250mm/255mm PMMA Plastic Fresnel Lens Focal Length 1000mm Solar Condensor

2pc 20mm Mini Round Optical Magnifier PMMA Plastic Fresnel Lens Solar Condensor