I used this from around 2019 to 2021. It was on a large motorcycle and has been used for about 30,000 kilometers. I'm selling it because I no longer need a top case. It's really... big... if you put it on a mini bike. It has an expandable structure inside. It can be expanded from approximately 45L to 58L. There's only one key. There are only two mounting brackets, so please purchase more if needed. This box cost around 50,000 yen at the time. I plan to gradually lower the price depending on my mood.