This kit includes -
In order to complete this build, you will need a 55 gal. steel drum and 4" thick concrete blocks. Also, you will need either some fire clay bricks or the optional circular Barrel Supports.
A cast refractory Barrel Cap to fit over the top of the steel drum. This item is circular and 26" across. It is 2" thick and weighs 72 pounds. The material it is made from will conduct and store the heat from the exhaust.
Half-round Barrel Supports to form the round end of the wall made from 4" thick concrete blocks. These pieces have a generous 6" hole for connecting 6" stove pipe on its way up through your roof.