10PC 40mm Optical PMMA Fresnel Lens DIY Projector 3D VR Glass Lens Focal 28mm
10pcs 40mm Small Optical PMMA Plastic Solar Fresnel Condensing Lens Focal Length Projector Plane Magnifier,Solar Concentrator Lens. Round PMMA Plastic Fresnel Condensing Lens. This Fresnel Lens can b e used on Optical Projector ,Plane Magnifier,Solar Energy Concentrator.