Great for full page magnifier visual fresnel lens solar projects, starter survival tools, and other daily house chores. Made out of flexible PVC with a reinforced s lightweight and won'for t break. The sheet is for ideal for reading small print on maps, instructions or books and has the ability to magnify full pages. fresnel Lenses designed for people with low for seniors, hobbyists and professionals. Ultra-thin can be easily put into bag and wherever you go., Manufacturer: Obotsnoi