Thanks for responding Just 150mm. We wil also settle for any size similar to this;we want a coostove that is simple to build. On 1/5/15, Roberto Poehlmann <roberto.poehlmann at gmail.com> wrote: > Hi Crispin, > > ¿what is the diameter of the combustion chamber? > > ¿It is a conical chamber? > > Greetings. > Roberto Poehlmann >