Strongly recommended where your chimney pipe exits the stove jack in your tent or shelter, the Winnerwell 2. 5'' Triple-wall Heat Protector Pipe Section is compatible with the Winnerwell Woodlander and Nomad series M-sized wood burning stoves. The triple wall design prevents the hot flue pipe from directly contacting your exit point. The exterior diameter is 120mm / 4. 7 inches and is designed to fit perfectly with Winnerwell Silicone Flashing Kit.