INYIAN 10 PCS 300% Fresnel Lens Credit Card Size Pocket Magnifier Lenses for Reading or Fire Starter

Description

1.This Fresnel lens made of PVC plastic is extremely thin, flexible and shatterproof.2.Fresnel lenses are most often used in light gathering applications,such as condenser systems or emitter/detector setups.3.Fresnel lenses can also be used as magnifiers or projection lenses,it also great for enlarging fine print in books, magazines, maps, telephone directories, recipes, etc.4.Fresnel lenses can be a great and creative gift to children as a toy and those who need a visual aid.