Charcoal tablets 33mm 

Charcoal tablets are used to burn grain incense or white sage.

To ignite the charcoal, light it on one side. The charcoal will then crackle / sputter.
This is due to an ignition agent that is applied in the outer layer of the charcoal.
As soon as the charcoal glows red, it can be used to burn grain incense or white sage or something similar.

PAY ATTENTION !!!

CHARCOAL GETS VERY HOT. IT SHOULD BE AT ALL TIMES ON A REFRACTORY SURFACE AND KEPT AWAY OF FLAMMABLE ARTICLES WHICH ARE NOT INTENDED TO BE BURNED.
NEVER LEAVE BURNING CHARCOAL BEHIND. ALSO CHARCOAL THAT'S GRAY ON THE OUTSIDE CAN STILL BE GLOWING AND HOT ON THE INSIDE!