Available for immediate purchase YAMAHA Drum stool Purchased over 20 years ago. Used for about a year and then stored away. I don't know the model number. I couldn't find it even when I looked it up, so it might be rare. I don't know how to adjust the height of the chair. It's possible that the height cannot be adjusted. There are no particular problems with sitting on it. Also, since it's an old product, there may be other issues. Please purchase if you understand and accept this. If I can't find a box that fits, I will wrap it in bubble wrap for shipping.