Pocket-sized Fresnel lens! 5 arrived as I ordered and all are in perfect condition and each lens comes with its own protective cap to prevent scratching. I've always used them for back up fires (but they only work with light and it doesn't have to be sunlight, I've seen people use LEDs and it works). It also has some magnification. If you've never used it, it's just a magnifying glass in your pocket. Lighthouses use the same principle to project light for sailors but on a larger scale, but the idea is the same. Also unbeatable for the price and worth recommending. Delivery was fast.
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