This is an inner box for the Tamiya Mini 4WD Compact Bag. The color is a transparent red. The Compact Bag is very convenient for carrying to events, but it can be cumbersome to take things in and out when you have cars, parts, and tools all thrown in together. This was made to allow for at least some basic organization. The product includes the three boxes shown in the second photo (inner dimensions approximately 18 x 11 cm, depths of approximately 5 cm, 3 cm, and 2 cm). The bag itself is not included and must be purchased separately. The three boxes stack perfectly inside the Compact Bag. The boxes can be stacked in any order. Even the bottom box can be opened with a single action. I felt that a simple tray shape was more user-friendly than having dedicated spaces for motors and batteries. This allows for a high degree of freedom in storage. Photos 3 and 4 show examples of actual use and how the boxes fit inside the bag. Please refer to them. Made with a 3D printer, the material is impact-resistant PETG. This is a personal creation, so some burrs, warping, and surface roughness may be present. Please understand this. Please note that the product is sold as-is (no returns, no exchanges, no claims). Tamiya Mini 4WD Portable Pit Pit Box Japan Cup