These were in use around 800 BC and were precise instruments of measure. Some were designed and used to help navigate ships by the stars. Other Kuei-pi disks were placed as pillows underneath the heads of the dearly departed to protect their journey into the other world. Set into a deep mat and framed they make exquisite wall hangings. Also people have used them as unique looking trivits for a special look at a special dinner occasion. They are all hand carved and made from real Jade. They come in several designs, each one is different.rnPrice is for EACH Disk ordered.