The In-line Spark Box is designed to have a spark arrestor just above the stove.

5" version is the black model seen in the pictures.

4" & 6" versions are silver model seen in last picture.  These are a special order item and may take up to 6 weeks to ship.

Prevents almost all ash and sparks from going up a stove pipe and onto wall tent roof.

You can clean your inline spark arrestor daily, in 15 -20 seconds, without having to take down all of your stove pipe to clean the spark arrestor that is on top of your.  

Used by the U.S. Forest Service