2-Pack Fresnel Lenses 150 * 150MM Focal Length 160MM Acrylic Magnifying Lens Solar Fresnel Fire Starter/Solar Heating/Solar Project/Scientific

2PCS/Pack square acrylic fresnel lenses Size:150*150mm, Focal length:160mm, Thickness:2mm, Material:PMMA(acrylic) Visual Aid for education - Great for

Fresnel lenses are most used in solar concentration, solar heating and light gathering applications. Or cooking outside as a fire starter. Fresnel lenses can also be used as projection lenses or magnifiers. They are great for magnifying print in books, magazines, maps, telephone numbers, recipes, etc. They are great as a gift or toy to childrens who need visual aid.

2-Pack Large Fresnel Lenses Φ300mm(11.81) Focal Length 600mm Acrylic Magnifier for Solar Heating,Solar Cooking,Visual Education. (Focal Length 600mm)

Fresnel Solar Concentrator Optical Acrylic Lens, Taiwan High-Quality Industrial Magnifiers - FDA Approved

1-Pack Large Fresnel Lens Diameter 500mm Focal Length 500mm Plastic (Acrylic) Lens for solar collecting,magnifying,solar heating,solar projector fire starter : Sports & Outdoors

Diameter 80mm(3.15) with focal length 60mm Thickness: 2mm, Material: PMMA(acrylic) Great for Visual Aid education, Solar heating experiment, DIY

5-Pack Fresnel Lens Φ80mm(3.15) Focal Length 60mm Optical Fresnel Magnifying for Solar Projects,Equipment Lens,Visual Education (Focal Length 60mm)

Fresnel Solar Concentrator Optical Acrylic Lens, Taiwan High-Quality Industrial Magnifiers - FDA Approved

Fresnel Magnifying Lens Plastic Magnifier Sub A4 Sized 260 X 177mm Solar Firelighter

2-Pack Fresnel Lens Φ240mm(9.45) Focal Length 100mm Acrylic Ultrathin Magnifier for Solar Heating,Solar Concentrator,fire Starter,spot Lens,Visual Education (Focal Length 100mm) : Arts, Crafts & Sewing