Shichirin Charcoal Grill Grate

Japanese charcoal grill called Shichirin. It is made with traditional diatom soil and keep the charcoal going really well. 

Size : W. 4.7 in x  H. 0.6 in
Weight : 6.2 oz
Material : Diatom soil
Made in Japan

Here is the shichirin.
https://www.art-onthetable.com/products/mikawayaki-shichirin-japanese-charcoal-grill-yakitori