Thank you very much for viewing. I am a drummer and am currently active in a band. I am organizing my drum equipment. The item for sale is a backrest for the 1st Chair series. I purchased a throne with a backrest two months ago, but I felt that the backrest was not suitable for carrying around, so I am selling it. I have searched, but I couldn't find the model number. Therefore, I have taken many photos. If you wish, I can also include photos of the throne I purchased. It has been used, but there are no noticeable scratches, and there are no problems with its use. When sitting in a chair for long periods of time, such as during practice, live performances, or recording sessions, a backrest can help to rest your back. If you are interested, please consider purchasing it!