This is a protective cover with a lid specifically designed for the Quad Cortex, made from 2mm thick acrylic. It uses acrylic hinges from Acrysun, which incorporate metal shafts, providing high durability and smooth opening and closing. The design also allows you to press the power button without opening the lid. If desired, we can include transparent double-sided tape that leaves minimal residue. (While we cannot guarantee that no residue will remain, we recommend using double-sided tape for fixing due to the tendency for warping caused by the manufacturing process.) 【Important Notice and Request】 As we have received high praise from many buyers, we pay close attention to packaging and shipping and strive to provide honest service. However, recently, we have experienced transactions that appear to be harassment, such as purchases with the intention of leaving negative reviews, from sellers selling similar products using multiple accounts. We have already reported these actions to the Mercari administration, and they are taking action, such as deleting the reviews. Such actions significantly damage Mercari's fair trading environment, and if they are repeatedly carried out, there is a possibility that the administration will take measures such as suspending the accounts. We will also report similar cases in the future and take strict measures. Furthermore, we do not have exclusive rights to sell this product. Actions that attempt to obstruct sales or monopolize through harassment or review manipulation hinder the operation of a fair market and should not be tolerated. We will continue to strive to ensure that you, the many people who are viewing this, can trade with peace of mind. Thank you for your continued support.