This is a cover specifically designed for the Quad Cortex, made from 2mm thick acrylic. For those who find opening and closing the lid troublesome, we recommend this lidless type in combination with a protective film for the LCD screen. If you wish, we can include double-sided tape that leaves minimal residue. (While we cannot guarantee that no residue will remain, we recommend fixing it with double-sided tape 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 take great care in 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 the fair trading environment of Mercari, and if they are repeatedly carried out, there is a possibility that the administration will take measures such as suspending the account. We will also report similar cases in the future and deal with them strictly. 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.