2PC Round 100mm Plastic Fresnel Lens Plane Magnifying Glass Solar Condensor
100mm round optical PMMA Solar Plastic Fresnel condensing lens 3D VR Glasses Magnifying glass, Solar concentrator 2pc. 100mm Round PMMA Fresnel Condensing Lens Plastic. Focal length: 40mm，50mm， 60mm, 68mm, 70mm, 80mm，100mm，120mm.