This is Masashi Uda's "Sankaku Wall" (Triangle Wall). I purchased it at the Matsumoto Craft Fair. I haven't been able to use it much because I have a small child, and it's been in storage. It's lovely as a flower vase for dried flowers or fresh flowers, or simply hung on the wall. You can also change the orientation to display it in different ways. Each side is approximately 15 centimeters. A 1cm diameter, 9cm long glass test tube is included. It came with insect pins, but I have lost them. It is unused but has been stored. Please understand and consider purchasing.