Unused, but a long-term storage item. Due to the long storage period, it has a smell similar to that of old books. It's a flat lens that has the effect of an optical convex lens. Invented by the French physicist Fresnel, it's called a Fresnel lens. It's thin and flexible like paper, making it easy to carry around. It's convenient to use when reading and can be kept as a bookmark. It seems to have been sold in department stores and famous stationery stores. ① Western letter size (215 x 280mm) ② Postcard size (100 x 140mm) ③ Business card size (55 x 85mm) ④ Portable size (37 x 90mm) Retail Price: ¥1,300 ¥600 ¥300 ¥150 This is a set of 4 types. There are many unused ones, so if you are interested, please consider them.