This case holds exactly 10 Game Boy Advance cartridges by inserting them into the grooves on the bottom. You can easily remove the cartridges by pushing them out from the holes at the bottom of the case. Assembly instructions are shown in images 3-4. Material: Red PLA * Will be shipped disassembled as shown in the second image. * Game cartridges are not included. **Discounts for Multiple Purchases** * For multiple purchases, small items can be shipped together in the same envelope, allowing for a discount of 175 yen per item. This discount applies to this product and other small items. If you would like to purchase multiple items, please leave a comment, and I will adjust the price of the listing accordingly.