Fresnel Lens, Diameter 14.96"(380mm), Focal Length 17.71"(450mm), Solar Oven, Solar Death ray for Physics Classroom, Fire Starter for Solar Heating,

Fresnel Lens, Diameter 14.96"(380mm), Focal Length 17.71"(450mm), Solar Oven, Solar Death ray for Physics Classroom, Fire Starter for Solar Heating,

1-Pack Φ380mm(14.96"), Focal Length: 450mm(17.71") High light transmittance, high efficiency in focusing, high precision Made of high-quality PMMA acrylic material, with high transparency and durability. Great for Physics Classroom Education, Solar Heating Experiment, DIY Solar Project, Magnifying, Scientific Research Tips: Wear sunglasses when using, so that the light is not too strong to damage the eyes Six Seasons is a Professional Manufacturer of Fresnel Lens and Optical Lens, If you have size customization needs, welcome to leave a message to us Size: Φ380mm(14.96"), Focal Length: 450mm(17.71"), Thickness: 3mm, Material: PMMA (acrylic), Groove pitch: 0.5mm, Transmission 92%