This is a pen holder band from MIDORI. The color is navy. You can hang it on your planner or notebook and insert a pen. I started using it with my planner in the middle of 2024. There are some scratches on the metal parts, but there are no problems with the stretching of the rubber part. The item for sale is only the main body (Images 3-5 are for reference). Would you like to try it out?