Fresnel Lens, Diameter 150mm (5.9''), Focal Length 70mm, Acrylic Lens (not Glass), for Physics Classroom Education, Solar Heating, Magnifiying. (Focal Length 70mm) workwarehouse The phone holder can be Size:1 m The phone holder can be attached to the car dashboard or curved surface and firmly hold your device to prevent them from scratching and dropping Compatible with tablets and smartphones with a USB Type C connector DIY Solar Project Solar Heating
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