Thank you for viewing. This is heavy glass, 3-4mm thick. A shatterproof film is applied to the back. I will sell it as is with the film attached. I plan to ship it sandwiched between cardboard or plywood. There is a possibility of breakage during shipping, so please purchase if you are willing to accept it even if it breaks. Please note that we cannot provide any guarantee in case of breakage. Also, there may be glass burns and stains. We will mainly use recycled materials for packaging, so please understand. Thank you for your understanding and purchase.