Made from 17oz. Silicone coated glass cloth with a solid silicone ring.  Canvas flap made from a 10oz Fire/Water/Mildew treated canvas.

Stove jack is 18" x 18" square offered in 4", 5" & 6".  Canvas flap is 25" x 25".

Actual Stove Jack Opening

4" :  4 1/2" wide by 5 1/2" length 

5" :  5" wide by 6 1/4" length

6" :  6" wide by 7 1/4" length

Oval shaped so that it will fit nesting stove pipe.

6" stove jack required for Wilderness and Yukon stoves.