Kou Xiang is the name of this instrument, an East Asian Jaw Harp originated in China, made in Vietnam. It is a similar version of the Dan Moi in Vietnam. 
It comes  with the wooden box like in the picture.
For European customers, we can ship this Kou Xiang directly to you from Vietnam if you want to buy more than 10 items. We use Fedex, the shipping is very reasonable, reliable and fast (only 3-5 days to arrive)