Due to shipping and system fees, as well as the cost of materials and the time involved, I am unable to offer discounts. Swan cartridges have quite fragile terminals and labels, so they deteriorate quickly without the original case. When trying to buy WonderSwan games cheaply, you often encounter them without cases, in a bare state. I also ended up with a lot of loose cartridges, and I wanted a large number of cases for storage, so I manufactured them for myself and acquaintances. However, they seemed to be surprisingly useful, and I received requests for more, so I started distributing them. They are printed in clear PLA resin, allowing you to identify the game title from the outside. (They have a frosted glass-like transparency due to the layer-by-layer printing process.) The cartridge can be inserted either way, but the lock is only on one side, so you can use it without the lock if you insert it in the opposite direction. ※See photo 4 I fill trays with cases, and I store titles I play frequently on the side without the lock. They are thinner than the original cases, so they are a bit smaller, allowing you to store more in a tray. I will remove the minimum amount of burrs (※Although it's not usually this much, as shown in photo 5), but if you are concerned about burrs or surface imperfections, please trim them with a cutter or file. I have confirmed that all of them fit, but please understand that due to the nature of 3D printing, there may be minor scratches and individual variations.