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5. Magnification: 3X6, Thickness: 0.5mm7. Item No.: IL-BM2018. Name: Fresnel Bookmark Magnifier, Hot Promotional Bookmark Magnifier, Customized Logo Bookmark Magnifier, Promotional Bookmark, Magnifying Bookmark, Magnifying Sheet, Card Magnifier, Magnifier Ruler, Fresnel Magnifier Bookmark,9. Material: PVC10. Plane Fresnel Lens11. Size: 140*38mm12. Logo: Welcome your customized logo13. Ideal for gifts, promotion, and sale purposes.14. HS Code: 901380100015. Fresnel Story:If you have ever looked at the lens of a magnifying glass, you know that it is thick in the middle and tapers down to nothing at the edges. In other words, it is shaped like a lentil, which is where the word lens comes from. It would not be very easy to make a big magnifying glass lens because it would be thick, heavy. Now, the thin piece of plastic you are browsing is called a Fresnel lens. It is flat on one side and ridged on the other. It is a high tech product, which is inventive by a French called Fresnel.16. More information, please send us inquiry.
Bookmark Magnifier (IL-BM201)