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This item: Polarizing Film Sheet - set of 10, Model: 93493, Gadget & Electronics Store $9.40 In Stock. Sold by Israeli First Aid & Shyh and ships from Amazon Fulfillment. It's film. Polarized film. And it works just as the image depicts. Unlike the image, however, you only get one sheet of it, but it is thicker than other films and is therefore more durable and handle-able. Keep it in the included plastic bag and ideally in a rigid cover of some sort (a book worked fine for me).